I am not sure of the company name right now either, however, there is a company which is working on a half door for the 73 thru 91 Blazer which would use factory styled hinges and is supposed to be easy to swap back and forth. From what I was reading about them they were supposed to take about 15 minutes to swap the door out and put the 1/2 on or put the full back on. I will do some more checking on the company, it was projected to hit market in late Dec. or early Jan.
I'll get back to you on it.