I answered my own question. Any 1310-sized unit will fit. I removed the shaft. The front joint was seeping (bad for a sealed joint) and the back was far enough gone that I had to try pretty hard to move it through it's range of motion (like the knees of a retired baseball player, it was pretty crunchy). The local driveline shop put two new greasable napaco joints with low-profile (needle) zerks for clearance, cleaned, painted, and balanced for about $150.
After cleaning and lubing the output slip-joint on the case, re-install took about 10 minutes.

Dan
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2005 Silver CRD Limited

245/75R16 GoodYear Duratracs
Fumoto drain | ProVent CCV Filter
Stanadyne FM100 filter | Cummins fuel pump
GDE Eco | SEGR | BoulderBars | FrankenLift | Frankenskids