Instead of your plan of trying to repair the butchered part, I would suggest looking on E-Bay and Gun Broker for the complete part and replace the entire metal assembly. Also try Numrich. On all 3 locations just enter 219 and 220 Savage parts. The parts are the same for either 219 or 220. You should be able to find what you need. If you don't find a complete assembly, check for the individual parts. Just be sure you get the exact one you have, as there are at least 3 different kinds of forearm attaching metal. I am away from home and don't have my research material so I can't be absolutely how many different assemblies there are. I hope this helps some.
I just found this complete assembly on Numrich. Information below. If it is the same as yours, it is about $23 plus shipping.
Forend Spring Housing Assembly, New Factory Original
Manufacturer: SPRINGFIELD
Model: 24 SERIES, 94 SERIES 107 SERIES, 219/220 SERIES, 940/947 SERIES
Product #: 148310B