I commend your search for more ethical products- Don't know about any whole bike manufacturers that are necessarily vegan minded, but one product I do use is bio-lube. It's made from vegetable oils, is biodegradable, cruelty free, and it works really well.
http://bio-lube.com/

Sidi shoes are I believe mostly all Lorica, and are great quality. Fizik makes a lot of vegan saddles that are also well made.