Reguarding cab mounts has any one found the right mounts for a 48 cab? Those cabs have the shackle set up int the center of the back but are suposed to have two tall rubber stoppers on the outer corners as well. Just the center shackle is not enough. I replace those a couple of years ago and just sitting in the shop it sags a little. I just can't find a complete kit that has the outer mounts.