Hey Gang,
  anyone know where a guy can get a hold of backing quality madake bamboo? I want to say it's Australian, but am not sure.  Anyone have tonkin suppliers as well?  
Thanks, MG

I think that Jaap Koppedrayer of Yumi bows grows and sells mandrake bamboo. I don't have his web address.

Youtube has his complete video collection of the process of making a yumi bow.

Yep, Jaap has some.  He lives in Odum, Ga now and is growing his own bamboo.  Madake is Japenese, I do believe.  He goes by Nachtwact, or something close to that, on the other big trad site.

Yumi bows
912-586-2763

Thanks fellas!

I got too sticks of madake from Jaap at coudersport. Finished one bow so far, it has more jump than moso and seems much harder.  Time will judge, as many a moso backed bow lifted splinters on me over the years, enough that I don't trust it anmore. Jaap told me the moso we have all been using is the weakest of the large bamboo, but the most common and largest.

Make that two (2), not also.