What is used to attach Spat covers

What kind of screws or bolts mount the little chrome toilet seat covers on the spats to the fenders on a xk120 rdstr?

#8 x 3/8" or 1/2" long flat head (i.e. tapered underside) sheet metal screws, aka self-tappers.

Thanks, trying to reassemble my 120 after about thirty years. I:m finding most of the pieces but the hardware is often missing

From what I’m seeing, seems to be about the average with these cars. We buy them young and finish them with one foot in the grave.