car-part.com can help with junkyard searches. be sure to search for various years of XJ since the part numbers changed but the trans will still work. 95+ will be external slave.
there are at least 3 pull-a-part yards near atlanta, but it's hit or miss on what they contain. the website will at least tell you what years of Jeep are there and what isle they are in. pullapart.com
you'll need a matching t-case too (spline count changes) as well as the crossmember, motor mount, and I think maybe the t-case linkage.
and as always, check craigslist for complete XJs.