Johnny made a few fair sets of these with both types of drops. They were selling back then for around $150 - $200, dependant on what drop type you wanted. Then he moved into doing them for 24" and 26" frames.
I have seen them sell for around £80 - £150, but any more than that is your money really, and how badly you want them. They are a new fork styled to an old image, so you may as well just get a new fork and use a 1" to 1 1/8" headset.