Hello Beth 22.
I wasn't quite sure whether to answer your question, because I did not set out to make a stoma guard, but wanted a device that would channel the output away from the stoma and down into the sleeve/bag.
This was achieved by making my own baseplate with a very slightly protruding wastepipe, onto which I could attach a 90degree bend. This has worked very well for me now for years and, incidentally, acts as a very effective stoma guard.
I don't think it would be appropriate for everyday use as it protrudes too far out. However. it has been ideal from the early evening (when I irrigate) through the night until morning, when I swap it for a stoma plug, on top of which I stick an inverted plastic cap which also acts as a stoma guard all day.
Most of my 'stuff' is what I can find in my shed, or what doesn't cost more than a few pence to purchase. I am not bothered about 'fashion' or looking 'good' and I am very confident about telling people about the why's and wherefores of stomas - if they happen to ask. So, there you have it! These things were not primarily designed as stoma guards, but they quite adequately double-up for that purpose.
Best wishes
Bill