Saw these on evil-bay. I contacted the seller hoping they were similar in size to the 105, but alas, they are a fair bit smaller. The 105 is 1-1/2 inches in diameter. The seller let me know that these are 1" in diameter and the brass ends are 4" on the female end and 4-1/2 on the male ends. The attachment is about 10" long.
If they are 75mm or 57mm, I am sure someone here can use them. They are on a buy it now of $100, which isn't bad as the brass stock would just about run you that much before you even start turning them.