There are a few
Autoworld does swap for $6000 labor only parts additional. I know a guy here locally that was the Cummins specialist at the Dodge dealership before going out on his own. He has done a few conversions and charge $3500 and up. I highly recomend him. As far as parts the sky is the limit. Do you want to go VE 4BT, P-Pumped, or common rail? What are you palnning to use for a tranny? What does your jeep have now? What about transfer case? Are your axles up to par? My guess is taht for about $10k you could have a good conversion. For $20k to $30 you would have the baddest Jeep on the planet with lots of tricks. There are probably others here who could give you more infor and have done a Jeep.