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.