etch resist inks?

i need to do some larger scale home PCB etching. I want to screenprint resist onto copper and am looking for the fluid/chemical to use. any ideas? I found a british distributor here:http://www.megauk.com/pcb_chemicals.php but would like to find a US one.

Try the Homebrew PCB Yahoo group; several people there are applying their own resist to boards. Screen-printing isn’t used much these days.