The #315 indicate the saw was probably made by Ryobi........Here's the manufacturers web site.........Check Service Centers and add your ZIP CODE
http://www.ryobitools.com/

I'm not sure its a Ryobi... its at least a 20 year old saw. I didn't get anywhere on the Ryobi website searching under model number nor "scroll saw". Let me know if you've got a better way to search that site. Thanks for your imput, I do appreciate it.

DID YOU EVER FIND A NEW HANDLE FOR YOUR SAW, I HAVE THE SAME PROBLEM!