Yeah right... the Inuit are some of the best meat eaters out there...
wildbillbugman (Bill Winkler) has been doing a lot of work on exactly this thing. See this thread.
And here's a brief primer on how to select a medium.
Now, if you're the kind of vegetarian that eats fish, maybe fish gelatin is the thing for you! Check this out.
Or I guess you could pick up the collodion process. The only living-thing ingredient there is cotton.
Best of luck.