Not to be pedantic, but nay-s/ ney-s are usually made from a sort of cane. They are considered "reed flutes," not bamboo. (Perhaps they thought people would get confused by the word "reed," thinking it meant a vibrating detachable reed as in a sax, etc.) These end-blown flutes don't contain anything like that. It's probably irrelevant, but that's been bugging me!

I have many friends I used to perform with that kept a selection of nay-s. The more "serious" musicians used a flat (shallow) hard case, lined with plush material - kind of like a gigantic cigarette case. Never heard any talk of scarcity of the reed material - which grows like a "grass" along the Nile, for one. However, the flutes must be obtained from that region, and I don't mean to sound as if contradicting the sense of trouble felt by losing them!