I don't think many shops seem to sell many faceplates, most have just a couple if any.
Playasia sell quite a few, not many game ones but maybe there's something that takes your fancy
http://www.play-asia.com/paOS-14-71-dg-49-en.html
I'm still using my Dead Rising faceplate, haven't found one to suit the console better since fitting it. Shame really, the whole faceplate thing hasn't lived up to it's potential IMO, would like to see more game related giveaways(with white backgrounds so it blends into the console).