Try these guys, I recently received a catalog from them.
1937 bed (complete) with tailgate and Oak floor $1225.00 add $80.00 for them to weld on the stake pockets and side angles.
Mack Hils Inc
PO Box 856
Moberly, MO 65270
Phone: 660-263-7444
Fax: 660-263-4403
