I customized a #18 JP Jeep into the #10 Maintenance Jeep (the one that gets chased by the T-Rex).
It was pretty easy, I just cut off the roll cage, and added boxes from an MBX Sahara Survivor. After that it was just lots and lots of detailing. Testors metallic red is a surprisingly good match for the red on the jeep.
This will join my detailed JP Explorer once I find where it went to.