Thanks & sorry for the delay, Bethany & I went to the east coast for mothers day weekend.
The cargo nets on the rear wall are simple, (really simple because I had the upholsterers make them!) I had Bethany look for cargo nets at thrift stores, (the kind they sell in auto stores to hold grocery bags steady in your trunk, they're about 16" tall by 3' wide, bag shape with bungee across the top) she got three of them for about .25 cents, I chose the one with the best size netting, & gave it to the upholsterers to cut up. Then they made a 1/16" cardboard cutout of the edge shape-then outward 3/4" wide, this was to hold the shape while sewing (they thought of this, not me), then cut out the netting to the outside of the cardboard, cut some bungee (from one of the other two nets) for the top, & sewed 1 1/2" nylon webbing folded over the cardboard, netting & bungee (making it 3/4") & sewed it all together. This got the size & shape to be just right, & held it stiff while mounting it to the wall.
The front dog bed area cargo nets are a simple bungee netting for motorcycle gear, 12" x15" unstretched, bought at Harbor Freight. they happened to be just the size I needed, & the stretching made the shape conform to the back window cutout shape perfectly.