Doepfer

Hello there, I was wondering if anyone knew if it would be possible to 
adapt the PSU2 power supply to output +9v and -9v rather than + and -
12v, maybe this is possible by changing some components? Or does anyone 
know of a way of incorporating diy 9v modules into the Doepfer power 
setup? (possibly similiar to the +5v adaptor AD5 - I think simply +9v 
is necessary for me).

thanks
Charlie