Try Auto Trader on the Net. You can type in what you are looking for in the "Parts and Accesories Tab", type in your contact details and then 50 odd breakers (literally) call you up and offer what you want for their price.
I have done this twice now with different things (205GTI rear Axle being one) they can then deliver to wherever you want for you to fit it.
You may have to sign in to Auto Trader web site first though.
Hope this helps