I have the same problem you do, only my aversion to feeding animals to snakes extends past the furry guys. I owned snakes in the past that ate insects, fish and the like, only to find that I really didn't feel great about that, either.
I'd heard of Egg Eating snakes (the type that eat nothing BUT eggs), but there wasn't much info. out there, so I just figured I'd have to get out of snakekeeping altogether. Thanks to the internet, though, I was able, years later, to find Egg Eating snake breeders, and buy a captive bred snake.
Some people contend these are not easy snakes to keep in captivity, but I would have to argue that they are quite easy to care for, as long as you have a good source for appropriately sized eggs. This has never once been a problem for me, as there are many, many sources for eggs of all sizes if you look a bit.
If this is something you're interested in, please contact me at mlsinclair@hotmail.com to discuss. I'd be happy to point you in the direction of a breeder (I definitely recommend captive bred/born snakes over WC) and sources of eggs and other relevant information.
Good luck!
Michelle