Making a slip yoke eliminator is really easy.  Just drill a hole in the middle of your shafts of the tcase.  You'll need to split it apart.  Get some flanges.  Then run a bolt through the middle connecting the flange to the shaft.  Done.
Brian
its a little more complicated than that , the track kick 3rd flange does match the splines on the tcase shaft ,but their is not enough yolk on the flange to reach the bearing race in the case and the flange also runs into the ceal of the case , what im doing is parting off the yoke on the driveshaft at 3'' then boaring the flange so that is a slip fit over the yoke then welding the flange to the yoke ,boaring the yoke out on the flange side 1.175"x.675",then making a slug 1.175"- x.5" and welding the slug in the center of the yoke ,this keeps the flange off the ceal and reaches the bearings. drilling a hole in the center of the slug , im going with a 1/2 20 bolt , if anyone has done this differentley or easyer let me know ,this is what i came up with