I would like to purchase a custom made UQ for a ENO Doublenest. I am thinking 48"x80" and I would like cinch straps on both ends as well as an adjustablw shock cord installed there and on the connectors to my hammock. Straps on the sides so that I can coccoon up in this would be preferred as well.

Has anyone made a DIY like this before? I would be inerested in taking suggestions also if you think you have somehting that would work better.
This does not need to be down but it does need to keep me warm in single digits and not be too large to backpack.