I'm afraid I just don't know enough about
it. Typically, colostomies are sited on the left and ileostomies on the right. A colostomy can be on the right, however, if it's formed from the right side of the colon rather than the left side. As for ileostomies, an ileostomy is sited in roughly the same place where the terminal ileum is. I don't think there is any medical reason why it
has to be on the right, though; but again, I don't know enough about
it.
You could try the Ostomy forum on this site, although it's rather quiet and 90% of the people there have had UC rather than Crohn's. The majority have a temporary stoma only. I'm not trying to put you off it; there just isn't really anyone in your husband's boat that I know of on there. If you google ostomy forums, a few do turn up on the first two pages of search results: they may be worth a try. Also, does your husband have a stoma nurse? If not, maybe he could ask his hospital for one...
Sorry I couldn't be of more help. I have an ileostomy, but it's brand new compared to your husband's stoma: I had it created almost two years ago. No serious complications or return of Crohn's - yet :-/
PS: For the sticturing, you could ask the surgeon about
dilation (stretching) instead. There's a bit more about
it here (under the heading 'stenosis').
www.fascrs.org/physicians/education/core_subjects/2003/ostomies_stomal_therapy/Good luck; I hope your husband can avoid surgery if possible. Hope the fistulas heal as well.