I built my own DIP bottom metal. I was a little time consuming (about an hour) but not that hard.
1. Go to Home Depot. For $6.50 I bought a 1" wide, 1/8" thick, 48" long chunk of flat steel bar.
2. Using your existing flimsy Savage bottom metal, trace the outline onto the flat steel bar. The bar will be just barely wider, and the same thickness as DIP metal.
3. Hacksaw the tracing to length.
4. Using an ordinary bench grinder, grind almost to shape. Once you get close, change over to a belt sander or hand-file. You can't put metal back on, but you can take too much off.
5. Once you have a perfect outside shape, mark and drill the two mounting holes. This should be easy peasy.
6. I used a smallish drill bit, and carefully drilled the inside perimeter of the magazine well with a stream of close holes. Again, don't drill too close to the edge.
7. Once you have a perimeter of small holes, it will be fairly easy to knock out the magazine well.
8. Just like the outside perimeter, slowly use a hand-file to cut the magazine well to size. Since you still have your flimsy Savage metal as a template, getting it perfect will be as easy has overlaying the two and taking small swipes with the file.
9. Polish off all the edges, sand it smooth, paint it black.
I also have a dremel tool and used a micro-router attachment to deepen the bottom metal inlet on the stock to 1/8" deep. Now I have DIP metal, sitting perfectly flush with the stock, for $6.50 and a hour worth of labour. Maybe two hours, since I am super cautious.