I just recently found out that a micrometer carriage stop from a 1941 heavy 10 will work on a 1952 13" SB .
I was surprised to find that it reaches about 1/8" beyond center of the contact pad on the saddle , correct height , and good contact .
I had a dial indicator holder that was on a 1939 9C , and it did not fit the heavy 10 .
So heavy 9 , heavy 10 and 13 should work , but I doubt the narrow bed workshop 9 stop would transfer to a 13 , and line up correctly .