Thanks for all the input everyone. I think I've got a lead on some good substitutes at a local hardware store.
Now regarding these stuck legs...I've tried everything. Brute force, various lubricants, WD-40. There is nothing that is getting them out. Please help me, I'm going insane.
One of them, I can't figure out what the problem is. The spring compresses, the leg moves around but it's stuck in its exact position. I thought that maybe the leg had rusted and gotten attached to the inner L shaped thing but I would have thought something like WD-40 would help with that.
The second one, the leg is entering at an angle and the spring just won't budge at all.
Help!