Welcome to the forums from the Wiregrass! The gun pictured in your first post is a 2nd Model, .38 S&W Double Action made from 1880-84, SN range 4001-119000. I can tell it is not a .32 by the size of the cylinder in the frame. Here is one I own.
Replica grips are available
here. Replacement hard rubber grips are found on eBay as are mainsprings.