Help ID cargo cover.

I need help figuring out what vehicle/trailer this fits. It's vinyl coated fabric, and reversible from tan to camo, and doesn't have any windows. Can't find any tags and the only writing on it is "REAR". Tag in the bag it came in says its from GMA Covers, but didn't list anything else.

The dimensions are approx 8.5 ft long X 6ft wide X 3.5 tall, but hard to measure all out on the ground.

Any help is appreciated!

By the size you listed a 101a1,2

Cool, thanks! Now if I only had a m101 trailer I'd be all set. Got two of these dang things.

PM sent.
Mark