Those cost as much or more than the breeders now. Still recommended, but not cheap or free. I just look at it as a donation for them to keep saving lives. Our most recent was found on the side of the road in a pillow case.
She’s doing much better now.
You can check local locksmiths. Some might be willing to sell cheap junk locks that are still good for picking. Or buy a core that can be repinned.