It is very, very hard to find one of these in the condition that this one is in. I had another one when I was younger, which I ended up using for parts. Both legs were snapped, so they did not move. From what I can tell, this issue is nearly impossible to repair. I don’t know if anyone has ever been able to do it successfully.
I got this new one off of eBay in 2020 for a little over $60, which I think was well worth it in this condition. Thankfully, both legs were in tact upon arrival. A 10 tooth gear replacement was required for the hip swinging mechanism, but that wasn’t much of an issue.