I personally like (and use) the JCR nut strips, because you use larger hardware.
You could probably go to U-haul and grab an installation kit....it's be oem, and tougher to install than a nut strip, they're usually just a rectangular nut that you have to fish into the frame rails... (3-5 per side = PITA)
you could TRY to find the OEM ones off of an XJ with a tow package from the JY... but more than likely its gonna be a rusty mess.