I made the PLTQ 7' x 30" with the foot pocket seamed up about 24". The PLUQ is folded the other way to make a 5' x 3.5' doubled. I am still tinkering with the suspension but i think it will work.
I also made a top quilt out of heavy fleece and it works well with the PLTQ. The fleece was about $6.00 a yard and I used 2 1/3 yards of 60" material or 7' x 5'. I am thinking about making a liner sheet of cotton and adding snaps or ties to secure the 3 pieces together.