Just built my first 'boo rod after many graphite rods. I found eBay sellers Golden Witch, Mark Fitch and Gary Williams to have good quality and prices. Mine was from Gary:
Casts very nicely, even compared to my graphite rods (action vs weight)...wrps still need a little clean up but I am happy with the quality of the blank. Gary installs the ferrules and applies several coats of varnish which saves a lot of work.