Having just done a lot of research on this same topic, my guess is that you will need to be very patient to find everything in stock. I saw some good deals at Brownells, Graf & Sons, and MidwayUSA, but most stuff was out of stock.
Check with friends too. One night I was about to pull the trigger on a kit bit didn't. The next morning an old friend came by my office and sold me his NIB 1983 purchased rock chucker with a ton of accessories and a couple dies at a good price.