Hi, Bulldog,
I didn't have a part number or model number but, it appears the 16" variable speed was a 21602 model so, I began searching there.
Hopefully these links will help you.
If not, perhaps you have a friend in a machine shop or tool and die shop that can fabricate the part you need? I did that with a couple replacement blade clamps. Sears pi**ed me off because they didn't have parts in the store
and I could order them on-line for a little over $2 but, they wanted over $9 to ship them!
If you are a member of eBay you can probably get about any part you want or a good deal on a used
Scroll Saw there also.
Good luck and God Bless! Check out the links below.
http://www.searspartsdirect.com/partsdirect/part-model/CRAFTSMAN-Parts/Saw-Parts/Model-137216020/0247/0744440?searchedModel=&blt=&shdMod=137216020
http://www.searspartsdirect.com/partsdirect/part-model/CRAFTSMAN-Parts/Saw-Parts/Model-137216021/0247/0744440?searchedModel=&blt=06&shdMod=137216021
http://www.craftsman.com/craftsman-16inch-variable-speed-scroll-saw-21602/p-00921602000P?prdNo=1&blockNo=1&blockType=G1