Teowayne,
As of 03 March 2014 there is a set of aluminum 4 Banger drop outs on eBay (~$65 plus $6.50 shipping). It does not come with a derailuer hanger, so you would have to source one as well. You could just replace the broke derailuer side. It would look a little asymmetrical but the dimensions are the same so it would work. If you decide to replace both sides you would need a 22mm mount Hayes rear brake caliper, or a mounting plate to use your existing brake caliper.
If you decide to part your frame, I would be interested. Let me know if I can help.
R88R