I have been using a Granit Gear White Lightening for a year now. I used it for 9 nights in Grand Canyon. It is a little heavier 8 x 10 19oz because it has adjustable straps at all the tie-out points and a sewn-in stuff sack. What I like about it is the edges and ridgeline have tension tape (stretchy) and it stays tight. I also use it for one of my hammocks and slept under it in a monsoon last fall.

You can use a piece of tyvek for a ground cloth or a scrap piece of sil. I have a bug bivy if I need it or I can use my hammock and bug netting for a bivy.

There are several cottage industry guys that will build anything you want at a very reasonable (cheap) price. Jacks or Better, Backwoods Daydreamer, Warbonnet Outdoors, Speer, and OES to name a few.

These guys all do great work and have a good reputatution, not to mention the fact that you will deal 1-on-1 with them.