Do any of you guys have any old fenders for it? It's coded as a red bike, but the tank had a sloppy coat of black put on it

/5 & /6 front mudguards are the same size/style, in prime the part number is 46 61 2 234 935.
. /7 type will fit, but are abbreviated at the back and use a different mount to the forks, but are interchangeable, part number in prime is 46 61 2 534 931. Since yours is a '75 it is the long wheelbase (short WB was 1970 thru 1972-1/2) so any Type 247 (about 1973 up to 1984) dual rear shockie rear mudguard will fit, except Type 248 models (R45 & R65).