well, like an idiot, I paid (with shipping, tax, etc) almost $100 for an alder body body blank (which they no longer offer) from Stewmac. Never again. For the next two, I went to Anawalt Lumber in Burbank, and found poplar (1 3/4 x 14) and had them cut 'em down to 20" lengths. I paid $22 for both!

I went back a week later to get more, and they didn't have any, so I had to get 2 10" and 2 6" and glue them together and ended up paying $42.

Still cheaper than anyone else, though.
As for questions, I literally screw 1/4" particle board to an already existing body and cut it with a router, (being careful not to marr or scratch the body is a pain), then screwing the template to the blank and voila!
It's so easy a 12 yr old could do it.