Chek-Mate offers a bow blank, in a R/D build.
Seven Lakes Long bows (Mike Ballenger) also offers a bow blank in a R/D form.
The Dryad blanks are excellent. I have done four of them, so far, and every one has turned out great.
Dryad does both all wood laminated bows, and glass backed bows, too.
Mike, Jason, and Connie are great to deal with.
Seven Lakes Long bows blanks are also nice, and I have done one of these, too.