Welcome to the forum.
I have this same revolver with the same grips. The grips were special order Wester Walnut.
The ammo is hard to find, as someone else mentioned. The round is sometimes refered to as "short" 38 S&W. Cheaper Than Dirt" just got some in and it isn't a bad price either. usually it is $8.00 tp $10.00 bucks more, when yu can find it. I think Remington is the only manufacture that still produces it. Link below: