Sorry to hear they crushed your only possible parts source on the island, especially if you need other parts, not just the driveshaft. Bummer.
Eagles have a driveshaft configuation suited to heavier-duty use than most other 4wd vehicles, being that they have a fixed output yoke on the transfer case. Most Jeep vehicles have a slip yoke in the back of the transfer case and a solid driveshaft tube, which is usually one of the first things that has to be changed when a Jeep is lifted more than a couple of inches. There isn't really anything out there from the other car/truck manufacturers with a driveshaft that is similar in length or has the same u-joints. A full-size Jeep rear driveshaft would likely be too long, and would need to be cut down, which is a really similar process to retubing, cost-wise.