Why not attempt it yourself? There are plenty of threads on this forum that will guide you through a swap. There is also a vast amount of knowledge here in Greenville (and people to help). If you are not a member of Upstate Cruisers, I would highly recommend joining them.
An engine swap is very intensive process. You have to modify your frame, splice in a wiring harness, adjust driveshaft lengths, etc... Not to mention any other unknowns. What did the previous owner muck up when installing the Jeep motor? Just about anyone you go to will give you a very high price based on unknowns alone.
And if you do it yourself, you will learn more about yourself and your vehicle. I went from barely knowing how to change my oil to fully doing a frame off restoration of my FJ40. The information is out there and the help is out there, you just have to seek it.