Cipa offers the Comp Universal Convex Rearview Mirror, part # CM02000 that fits round windshield frames that measure between 3/8 and 1-1/4 inches wide. It'll work great for your 1-1/8 inch thick windshield frame. view full answer...
I spoke with my contact at CIPA who said that the replacement mounting bracket for the CIPA Extreme Rearview Boat Mirror # CM02022 that you referenced is not sold separately. If that bracket is broken then unfortunately you will need to replace the entire mirror. view full answer...