Thanks, Bill. Reading that, the 6 digit number is a combination of the parts as an assembly. The 4-63 matches the diagram, 3rd from the left, on the top row, but I can't read the 4 digit part numbers for the different length handles. If one of those handle numbers is 3561, the 6 digits kind of makes sense, although it seems it is missing another 3 for the handle number. I measured my handle at about 11" from the weld to the top of the threads. It would be interesting to see if one of those handles was about that length and was numbered 3561.
