if you want someone to design you a custom PCB from the existing schematic, well, that's a schematic capture and layout job (maybe also a bit of a design job, seeing some of the original parts will be really hard to source and probably need replacing!)
if you want to reproduce the boards from scans, as exact clones, you can probably get someone with photoshop/illustrator skills to attempt that, though getting the scale right will be fun. And you'll still have to source all the old bits and pieces.
Either is do-able, but given the number of different boards you need to make all the modules you will want for a modular synth, I expect it will be more than you are willing to pay. Might be cheaper to just by one of the reissues commercially available from Moog. (Or a synthesizers.com system...)