OK. Thanks. I found the S10F-91 part number in a later parts list.
I just got off the phone talking to someone at Clausing. They have one S10F-91 left in stock @ about $50. When that one sells, according to their computer, they will restock, so they won't release the drawing that has presumably the dimensions and the manufacturer's part number on it. And the new stock will no doubt have a higher price as the last order was in 2011. So, Stefen, if you're going to buy it you should do so before someone else grabs it.