There is a well-known frame maker called Matkins Extreme Frames. Their web site is: http://www.matkinsextreme.com/

They make YJ frames. Call them at: 406-248-3797

I don't know what their prices are. They are really heavy duty frames, so I suspect they aren't cheap. Good luck.

1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.