Kind of funny the OP neglected the old plastic fantastic and finally killed it. Who would ever expect them to last this long? If anything it proves their worth. Bonus is when the jockey screw/nut went into the wheel, the plastic snaps saving the spokes and dropout.

I probably would scout a LBS and the junk bins for any old derailleur with a claw. Thinking a shop would feel bad for you and give it to you freely.