Wow, you must use a different internet than I do. 30 seconds found these from very reputable dealers.
http://www.speedgoat.com/product.asp...t=55&brand=226
http://www.bikemannetwork.com/biking/c/COMPCASS9RDSH
There's also a little company called SRAM that makes Shimano-compatible cassettes, as do Miche and IRD, perhaps you've heard of it?
I'm with yellow as far as leaving the conversation. You appear more concerned with bling or some mind game than making your girlfriend happy and getting her on a bike. You get her there, you can upgrade any frame to 10 spd down the road. Upgrading girlfriends is a whole different ballgame.