You don't say what's wrong with the ones you have.
First thing would be to put an ad in the parts wanted section of the swap meet. Someone may have some priced reasonable.
My second thought is to repair the ones you have. Sections of the edge or top surfaces from any running board could be used to patch holes. Lots of work yes, but given the rough look you describe, not as bad as it might be.
I have a set on a 1-ton panel that are awful. I've wondered what I could do with them, and currently think I'll play the repair game.
