I've always been interested in this but have never tried doing it myself. I'd love to make my own jigs, crankbaits, and maybe a spinnerbait or 2. It's hard to find certain baits in certain colors that I need at times, which is a big let down before a weekend on the lake. How hard is it to do this? What can I expect to spend for say, making a few 1/4 ounce jigs, a couple of crankbaits, and a couple of spinnerbaits? Also who sells the materials needed for this? Thanks Nathan. That's exactly what I was looking for.
Do-it-Molds sells materials for all those. Check out the link I put below.

