Im thinking about going to a doubler...I currently have a np241 that orginally came out of a 89 suburban. It was a 27 spline but I changed it to 32 to work behind my th400. I would be willing to sell you the shifter, the adapter, the tcase, and the clocking ring that is currently installed on it.
Now the bad. I had an issue the last trip out. The first few threads, for the holes that hold the tcase to the adapter, are stripped out. Not a big issue as I running longer bolts. When this happened I had to be towed back to camp and in the process the front out put bearing/seal is leaking. Its still in my truck so I have not looked at it to see what it is.
Make me an offer. PM for more details.