Hi,
I have some FR4 for sale if you are interested.
This is material from well known telecom company that has closed down
one of their PCB factories. High quality FR4 in stock as listed.
http://goto.glocalnet.net/Bengt.CNC....pcb%20clad.htm

I believe these thin FR4's can be used for various parts.

Feel free to ask questions

Cheers
Bengt