What a bummer that Miyarisan is no longer available on Amazon - I just checked now, and it is indeed not there anymore. We ordered it on Amazon and it shipped directly from Japan. I'll have to research a little and see if I can find another source for it. At this point, my father in law is the one in the family using Miyarisan. He has chronic constipation, and found that Miyarisan worked wonders for him. Whenever he gets stopped up, he takes Miyarisan and everything normalizes. Unfortunately, it didn't do much for me, but it has such a positive effect for him that I know it's doing something good. We bought a bunch of bottles last year to keep him stocked up. If I find an alternate source for it, I'll let you know.
There is also a monster-long thread here on PR about Clostridium Butyricum (Miyarisan), which is very interesting:
http://forums.phoenixrising.me/index.php?threads/clostridium-butyricum-a-game-changer.37324/
My husband and I do A LOT of fermenting (at least during our "better" moments when we have the energy) - we lactoferment sauerkraut, kombucha, wild yeast sourdough bread, yogurt, we make our own wine and beer and mead, etc... not just for the probiotics but mainly because fermenting not only makes existing nutrients more bioavailable but the action of the bacteria actually creates vitamins as a by-product. Recently, I made a batch of sauerkraut that tasted amazing, but my husband said it didn't smell right (he has an amazing sense of taste and smell while I don't). I didn't listen to him because it tasted so good, and I was being obstinate (I hate throwing things out), so I decided to eat it anyway in my usual stubborn style. I got some GI distress as a result, and it turned out there definitely was something off about that batch. Then, I started reacting to other probiotic things (like kombucha) so I was worried that I'd allowed something bad to colonize.
Since I don't have any Mutaflor on hand, I started taking a probiotic from Nature's Way called "Primadophilus Reuteri Pearls" (I ordered it on Amazon and it was fairly cheap. I'm sure there must be other brands, but this is the only one I've use so far.) and within a few days all my GI distress was gone, and I'm not reacting to kombucha anymore. I was initially worried that the Reuteri wouldn't be aggressive enough to unseat the pathogenic invader, but it seems to have worked well. In addition to E. Coli Nissile 1917, Reuteri is my other favorite probiotic. If you read the research on it, it's amazing and probably one of the most important probiotics for just about everything in the body. For anyone who is having trouble getting Mutaflor (I order it from abroad and it's quite expensive), I'd suggest looking into Reuteri. Even if you don't use it, read about it, it's very cool!
I'm sure you can look up the ingredients for the Nature's Way Reuteri online, but since you mentioned you were allergic to corn, I looked at the ingredients listing and it seems to be pretty good, so unless you have an issue with soy lecithin, these should be allergy friendly. The ingredients listed are: coconut oil, palm oil, fish gelatin (Tilapia), Glycerin, Soy lecithin, Pectin, Silica.
Most of those ingredients are probably for the enteric coating. The Reuteri are in little enteric coated pills because they will get destroyed by stomach acid. Reuteri is found in human breast milk, but infants don't produce stomach acid, so they are able to colonize the GI system without getting destroyed. For adults, the enteric coating is necessary to get the Reuteri where it belongs without getting damaged by the acidic environment. So if you get another brand, just make sure it's enteric coated.