I have not purchased any bows from them.  One can purchase a myriad of supplies for the making of your own bow, however.   My current needs are being fulfilled by using lamination kits,  as I have the rest squared away.   It is rather against my nature, it seems, to do things conventionally.  And for those of us with this affliction,  Bingham Projects is right up our alley!   Here is a good place to start......

http://www.binghamprojects.com/starting.htm

Interesting that you mention the Yumi.  Although I have never made a Yumi bow, I have studied their dynamics after taking up the bow.  A residual interest from my martial arts days and having observed Kyudo being practiced on occasion.   I have never built a Yumi bow as my interests have run (as usual) more toward sheer efficiency/utilitarianism.   They are, however, truly works of art!  Jaap Koppedrayer, a North American authority on Kyudo, is quite proficient with the Yumi, having made various pieces, himself.  He will be at this year's International Horse Archery Festival. 

http://www.intlhorsearchery.org/press_release_2004.htm

This festival is held yearly at Fort Dodge, IA.  and is a real treat!  Last year they had a raffle of one of the bows used on the set of "The last Samurai".   Meg Beshey, wife of Dave Beshey is certainly the driving force behind the event.   Met them at last year's Nebraska traditional archer's event.   Jaap Koppedrayer's ability is something to be emulated, certainly.  He is well versed in all aspects of the Yumi style.

Here is a pic of Jaap:

http://www.hornbow.com/past.html


Johnny,  If you can swing it,  This year's IHAF at Fort Dodge is well worth attending, and being centrally located, draws in quite the attendance!


P.S.  With your sense of style and ability.....I think you could build a rock solid performer of any design you put your mind to!   A purist would be hard pressed to resist the temptation to use Bamboo in a Yumi bow....It would be interesting to see your take on it.   Why not a hickory Yumi!   

A wooden Yumi is actually basically what the earliest Japanese bows were - at least, they were long, thin, assymmeticral, etc.  Very easy to make, to be honest, from a single piece of wood.  They'd probably make a good survival bow, actually.