These are the mail order catalogs I get. Some have some people stuff, some don't.

www.cherrybrook.com
www.kvvet.com
www.valleyvet.com
www.drsfostersmith.com
www.planetdog.com
www.petedge.com
www.upco.com

Are you looking for anything in particular, I might be able to direct you to a specific company rather than just catalog.