Hello judgelori.
The stomaguards work quite well as long as they can be kept in position. I found that mine 'drifted' so that the edge ended up over the stoma and caused the very problem I was trying to avoid. I did try different types of modern packaging - (that is used to wrap and protect goods sent in the post) but it nearly all had problems of different types that I was unable to live with it on my body.
I bought some small samples of neoprene (The stuff they make wetsuits from) for something else I was experimenting with. It comes in different thicknesses and different colours ( I chose skin coloured ). This worked very well against my skin, which can be sensitive to lots of stuff. It probably would give you a degree of protection but would still need some way of attaching so that it did not 'drift'.
If you are suitable for irrigation, I would definitely recommend that as an option, as it opens up many more oportunities for wearing 'protective' gear for your stoma. I normally wear a wide belt with one of those clip-in buckles, which I situate directly over the stoma. this really protects it well, but it would be no good if you were to have output into a bag (This belt is one designed to keep people safe in wheelchairs).
It is a pity that someone doesn't invent a belt buckle specifically for stomas - When I was a boy-scout, we had a round metal buckle that might have been ideal for my purposes today. I keep on the lookout for suitable buckles and, apart from the one I use, the most promising ones (ironically) seem to be the ones that nurses wear.
I do hope you find a suitable solution to your problem soon.
Best wishes
Bill