1931 Victoria Door Hinge Mirror

[Ed in Maine]

I want to put an outside mirror on my Victoria. These cars use an oversized hinge pin (0.279). Does anyone have a source for these oversized pins in SST that are longer to accommodate a mirror? I have purchased the mirror but the hinge pins that come with it are too small. Also, has anyone drilled out the bracket on the mirrors to receive the larger diameter pins? Is there enough metal in the bracket for the larger pin? Thanks for your help, ED