Here's what I would do...
Make a plastic mock-up of your Droid. Doesn't have to be exactly perfect, but if you shoot for perfection, you'll end up with "above acceptable". This could be done by purchasing a sheet of Plexiglas and cutting out Droid-sized pieces, and laminating them together. You can use a fairly coarse file to round & shape the model, and then sand paper to clean it up. Go slowly and methodically and consistently. It should take you many hours to make this mock-up! Use finer sandpaper (wet/dry paper with water) and work your way up to about 400 grit. 400 should get it smooth enough for what you need.
Now for the fun part!
Get a quart sized container of Bondo fiberglass filler. Ask your local automotive store clerk for help, and explain what you're doing. Also get fiberglass cloth. You'll need Nitrile gloves (cheap, and don't get latex!), full cover safety glasses, and disposable breathing masks. -About $15 bucks in safety equipment that's simply a must have.
Use the mock-up as your model to wrap or curve the fabric to conform. You may need to paint the dummy-Droid with Vaseline so the Bondo doesn't adhere to it. Wrap the dummy up how you like and paint the back of the cloth.
You can also use carbon fiber and the associated adhesives for that, but I believe it will be far more expensive. The pros to this as an alternative to bending up sheet Poly or Plexi with heat or gluing multiple pieces together is that the fit will be like a glove, it won't want to warp out of tolerance as you work it, and you can paint it.
You'll also be able to sand & shape it a bit easier than the plastics, I believe.
Once you start the fabric layer, you can build up on it to thicken it. You can cut for the charger cord, etc, and insert a bung, and build up around it. It'll look terrible and hopeless as you start, but when it's finished up and you paint it, it will look fantastic and surprise you. But painting properly is a whole 'nother discussion that you will absolutely have to have for best results!
-Better make a couple at once to sell to pay for the materials.
I have not done this myself, but I have a friend who does carbon fiber hoods and laptop lids in fiberglass or CF. Of course, he made it look really easy! LOL
I bought a charging station at Target for cheap that I thought would be great for my the new Droids my wife & I got, but it's too narrow.
So I'm gonna build one that's perfect using Legos, and glue them together. -Complete with a bottom drawer.
