Yes, i believe the erudite term for this is a "daruma bolt"... most fenders can run either the straight bolt or an L-bracket set-up. Cheap/easy/new/available would be the Wald #962GB-26; this is the gloss black version, which will be easier to paint thn the standard chrome plated #962. I'm pretty sure that 1952 phantom will be a balloon-tired bike, but if it's a middleweight, check out the Wald #952-26