Shawn, I get snowshoe where I can find it whenever I'm traveling. I believe I've ordered some also. The last feet I bought were found in West Yellowstone at Bob Jacklin's Fly shop. They were excellent, and you might check on the internet and order some feet from him. I liked him, and he seems like the kind of guy who will pick out what you want for you, if he has it in stock. I find no difference between natural and dyed fur, but prefer the softer, denser heel fur for emergers, at least, where a ball of a wing works fine. And I mostly use snowshoe for emergers. I believe it traps air better than the coarser fibers, but if you try snowshoe, see what you think. I prefer the natural white feet when I can get them, the whiter the better, but not for any difference in flotation. The white clump wing can be seen at dusk on the emerger, and gives me a few extra minutes of being visually in touch with my fly. Gonzo has noted to me that when one loses sight of the fly, it's time to tie on a wet, and my brother-in-law, a skilled wet fly fisherman proved that recently, cleaning up on the Little J just at dusk. Jason, if you're on, I'm still waiting to hear from Walt, but I should have enough info to PM you soon.
"He spread them a yard and a half. 'And every one that got away is this big.'"
--Fred Chappell