Scarletfire - what you had a link to will certainly work, but it would be a lot easier to go buy four 4X4s which will actually be 3-1/2" x 3-1/2" and put them in the bed length wise. Your TC should then clear the bed rails by 1/2"
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.