Art, Victoria British has a simular mirror which was on sale for $9.95, their reg price is about $20. I don’t know how you are planning to mount the mirror but I had a motorcycle mirror on one of my cars. I mounted it in the lower windshield frame bolt hole by threading the shaft of the mirror so I could have a tapered nut on the outside of the frame and used the mirror in place of the lower bolt with a nut on the end which was inside the car. This may interfere with the side curtain depending on how the curtain is shaped but it worked well as far as the actual function of the mirror.