Bamboos only flower very rarely, so with respect to obtaining seeds, the chance of you getting an exact species is virtually nil!

You may wish to have a look at:

http://www.minigroup.com/pfaf/board/viewtopic.php?t=5

to find out what seeds are currently around, otherwise get in touch with a local garden centre - There appear to be a few other individuals from garden centres that may be able to deliver a plant locally