...........or if you are fairly handy, make a pair from some 4x4 dimensional lumber and a piece of all thread and a few nuts and washers.
We have one of the BAL originals as well as one of their X chocks along with a pair of my homemade pieces. They all work well though the homemade take two wrenches instead of one.
Dave W along with my DW, Susan and our poodlepups, Callie & Molly,2011
Ford F250 6.7 CCLB, 5er Hitch Option w/B&W Hitch,,Ride Rite air bags, 2014
Montana High Country 343RL (38')w/disc brakes