Halloween // are there good fixes for skeleton joints? Hopefully more sturdy.

So I have a few skeletons that I occasionally put outside, see the Die Hard photos, every so often just for fun. Now a couple of them are starting to have bad and broken joints. One has a broken shoulder joint and the arm fell off.

I'm looking to see if anyone has and good, strong joints that I can do to fix them up. I tried looking to see if there are any ball joints at the local hardware store, but didn't see anything that might work, but I didn't look too hard. I did try those folding drywall parts, but the ones that I have are too big to fit inside, I have ones that are 2".

If anyone has some good ideas I'm all ears, and broken joints.