I have a ton, actually more like two tons of bamboo in stock. These are two inch wide Moso bamboo slats. Seasoned over one year. I sticker and rack them to ensure straight slats. Wholesale pricing available. These are 8'. generally cut to 72" for shipping (with regard to node placement), but can be left longer, although this does increase freight costs. See http://echoarchery.hgsitebuilder.com/bamboo-bow-backing for pricing.
Also, I have considered offering parallel grind lams for glass laminates as my wide belt sander doesn't see enough use. Pm me if interested in such a product and provide any specifications you would like to see.