I paid less than $400 for a set of 6 pistons from Egge that I used to install a 235 crank and rods in my 216. They even fitted the pins from my pistons in them. I was pretty satisfied with their response. But you're probably correct about custom pistons being EXXXXPENSIVE. I also talked with Ross Pistons, and they'd do custom pistons for around $1300 for a set of 6, IIRC. I passed on that, of course.
