No one currently catalogs a .32-20 revolver that I'm aware of, but there are quite a few around on the used market. Gunbroker currently has over 60 listed in that caliber, a mix of SA and DA Colts and DA S&W's.
Here is my pair or tricked out race ready for SAS competition cimmerons I quit going to shoots after they came never did get to compete with them. I often thought about selling one it is a sweet cartridge. Widow