We had a
Uhaul camper which is almost identical to your
Burro. We bought a carpet at Lowes or Home Depot (they both had it) that was made from recycled plastic bottles. They had it in a 6 X 8 foot roll, but may also have it on a bulk roll. Attached it to the center of the ceiling using contact cement in a can and a 4" roller or throwaway brush. Worked real good but you have to get it lined up perfect when you attach it and be careful not to use too much cement or it will bleed through the carpet