Here is one I made from a cheap folding work stand I picked up at a discount store and some PVC pipe. I've used it in the shop and out at the field. Cut the PVC at whatever will be the right height for you. I put some foam pipe insulation on it for the plane to rest on. It comes apart easy and folds up for transport. Plus the folding stand I use for other stuff too. I have maybe $20 in the whole thing.