That's the same problem I'm having with my '48! The pics Brad posted are the same as the mounts on the truck but the new bumpers they sent look different and don't even mount in the same manner. Tech support claimed they'd never heard anything about the bumpers being different than original.

I could drill some holes in the cab floor for the cone bumpers to work but would rather find the original style. Has anybody found a place to purchase the originals?