I have a Model 57 that was shipped last year. When I handle it alongside my similar Model 28, the grips just don't seem to fill my hand properly. They seem too narrow at the bottom. Are grips available for the newer revolver that would fill my hand like the target grips on the Highway Patrolman? I presume the new gun has a round butt, but I'm hoping there is an appropriate round-to-square conversion target stock out there somewhere.