Perry,
I had mine made by Bentley in Portland. Good quality, but I did not get exactly what I wanted. I am not sure if I couldn't explain, or if they couldn't hear, but I did not get the top zipper that opens up the top so that you can step down into the boat when at a dock. I have to undo a couple of snaps, which is inconvenient, but not impossible. No complaints otherwise.
Another couple of things to consider before going for it are whether or not you want to get to the battery/live-wells from inside the camper back, plus whether or not you will want a cooler rack over the splash well. It can be handy to get to your batteries without having to unzip a back panel. The cooler rack sticks quite a ways back, so you need a back panel that fits around it. I think that Tim Welborn on True Story has his boat set up like that.
The best canvas work I have seen was by a couple of guys up on Whidbey Island doing business (as I remember) as Canvas Makers. I think they have split up and are doing business independently, with one guy now in Mt Vernon. My suspicion is that Les Lampman or one of the folks in that area could point you to them.
Steve