MetalTech Wall Hauler Series 2000 40 in. x 16.75 in. x 44.25 in. Heavy Duty Drywall Cart with Wheels, 2000lb-Capacity Rolling Cart I-BMD1931YGR - The Home Depot
COMMERCIAL "JUMBO" DRYWALL CART - WRAP-AROUND BUMPER WITH INSET BACK - Jescraft
Amazon.com: Folding Drywall Cart Heavy Duty,Panel Cart Load 2200 lbs Capacity,Drywall Dolly with Rubber Swivel Casters,Panel Dolly Handling Plywood Sheetrock Glass and Windows Service Cart : Industrial & Scientific