Welcome to QB, Frank. I'm guessing you have read about most of those machines take a 206x13 needle system. I don't know the particulars on it and hard to find or replicate the timing belt. I know there is a parts list at
this link, but not sure how helpful it would be. There is also there is an after market one at
https://www.vintagesingerparts.com/c...+Related+Parts
just went back to that link and says it is sold out.