A local Head shop. Online usually has better selection though, i suggest www.spoonyswholesaleglasspipes.com thats where i got mine and they are great.
If they do it will be expensive as all fuck. You might as well go someplace locally, because then you can actually feel the thickness, visually locate any defects, you can barter on prices, and you support a local small business. If you can't find a local place that will sell to you, order from a site based in Australia, not that I can help you locating one of those. StonerBill might be able to point you in the right direction though
Just google, Australian Pipes, it should come up with a few sites taht sell pipe based in australia *correction, Austrailian Glass pipes, you dont want any wood shit.*
