This is another "supply and demand" issue. Lots of people want them, but aren't willing to pay the price to get them since there is no tooling (that I know of) to start manufacturing them again at a price people were willing to pay.
Mark Shilling (in the Chicago/NW Indiana area) had some of these made up at one time. He was selling them as sets w/upper and lower pans for $2K+ a few years ago. I don't know how to get hold of him or if he still has any sets left.
I thought The Parts Place was offering them at one time, but not sure.
