I did get a Curtis thru Steve at NPE. I was sorry to hear he left the business, after he went the extra mile for me. I took my time and got it on last Saturday - just in time for warmer weather! I was happy to find that it came with a glass rear window panel and (lexan) quarter windows that are oriented 45 degrees from the sides. Visiblity is excellent and the whole thing seals up pretty well. For the most part the fit is very good, but I did run into problems.
I need to shim the door frames up a little more so the bottoms of the doors clear the floor mat and seal (can't raise the doors or they'll hit the top). I'm also going to relocate one door striker bracket with the mig after having to bend it to get the door to latch. The wiper arm coarse splines don't match the fine splines on the motor and have been mostly wiped out by my efforts to seat the arm. The motor seems a cheaper unit than the one on the old cab, but it'll probably be fine for the use it'll get.
With the doors off, the cab seems to disappear, so I don't see me taking it off for the summer. I just have to watch my head when I jump out!
I plan to add lights on both ends and a boat rearview mirror inside. It'll be lovely.