There is an Ebay seller from China. He has an excellent feedback rating. He sells new Bamboo flyrods in the class you are looking for. Problem is I erased his bookmark. I also couldnt find anything listed for sale by him now. Ill look again in a couple days and let you know if I spot him. In the Westbrook flea market co-op on Rte 1 there was a vendor who repaired and sold bamboo reconditioned rods. Hes the only local Ive seen that carried a stock of bamboo rods. The owners may have info on his whereabouts.

Look at Hexagraph
They are graphite but built like bamboo-
about half the cost.