I spoke with Mark at Greensburg Machine last week. He said he didn't have a slip yoke for a 241DHD available for a 1480 joint and didn't think that a 1480 joint was needed at that end. The axle end is normally the problem.
What shaft thickness are you all running? Stock is 0. 083", you can go 0. 095, 0. 120, 0. 134, heck I think bobcat98 went with 0. 180"! That has got to be one heavy driveshaft...
I should be getting all my driveshaft parts tomorrow. Mark is a great guy to talk to and deal with.
If you find one, post back here where you got it for future reference.