There are a fair number of Moog lowpass filter schematics out there. Some have been made available as ready-to-solder boards. My guess is that these designs will be simpler than the Moogerfooger boards, which use lots of 13600's for bypass, and are fairly complex (and sometimes noisy) as a result. Try using the Minimoog filter as a start, as it has a lot of the desirable characteristics, and the +-10 volts would probably work with +-9 volts without too much of a problem.
I own a Moogerfooger Lowpass, and the filter itself sounds great, but it generates a LOT of noise, even when bypassed. I think that a non-clone may end up sounding better.