The easiest way to do it would be to order PCB kits from Brian for both the lm3886 and lm1875 (the lm1875 is a prototype, but he will normally give them out anyway), as far as the preamp goes you could do a couple things including: build your own preamp, line out from an existing guitar amp, or buy a preamp like this:
http://www.musiciansfriend.com/product/Live/Sound/Signal/Processors?sku=182482
http://www.musiciansfriend.com/product/Live/Sound/Signal/Processors?sku=182482