My best advice is to save your money and buy another firearm. Rohm's were not made to the best of standards and parts are almost non-existent
In perfect condition the Rohm RG 23 .22 cal runs from 50-75$ hope that helps
20-60 USD or so
rohm is an old German import. no value and not too safe to shoot.......
Try e-gunparts.com, gun shops, gun shows, want ads, internet searches.
RG10 pistol-ROHM
10-60 USD or so
ROHM
try the gunpartscorp.com
triplek.com
Brownell's, MidWay USA, Gun Parts Corp, want ads, gun shops, gun shows.
Internet, gun shop, gun show, want ad
Walther, Beretta, Browning. Kel-Tech, NAA