If you go to the R&B website, under "Ideas and Advice" there is a section called "Artisans and Designers" -- the maker of your sofa may be listed there.
http://www.roomandboard.com/rnb/ideas_advice/artisans_designers/artisans_designers.ftl

I'm a big fan of R&B's Reese sofa, which is made by McCreary Modern -- very hard to get except from R&B.

amykl, where do you see that Reese is made by McCreary Modern? R&B's website says Reese is made in Virginia.

Definitely looks like an American Leather sofa. Check their website. I think it says that they sell to R&B. I knw that Crate and Barrel & Design Like it Matters sell AL too. I have one of their sleeper sofas. My decorator passed on her 15% discount from a local store that gave designer discounts. Not sure where you can get it discounted otherwise.

Here is a link that might be useful: American Leather