I found an excellent and inexpensive one on ebay. It is the only thing I have purchased, to date, via that service.
Its made from pvc pipe, with a textured surface. It almost looks like wood, and it almost sounds like wood. My breathing technique has improved from playing it.
Steve tells me its beginner's luck. (He may be right. The seller had a lot of negative feedback, and is no longer selling on ebay.)
I think it was made in india. In any case, its perfectly tuned, and I get lots of compliments every time I play it in public.
I hope you find one thats right for you.

Ingrid