RealModels makes a resin kit ( in 1/35th ) of the M54 cab...
Try LSA Models M.O....( www.lsamodels.fsnet.co.uk ), or F&F Models ( www.fandfmodels.com ), two english models shops....
Of course, you ' ll need one of the Italeri 's M 920 serie kits for the chassis, wheels, and bed, to make this sadly missin' beast !
Have a nice day...!