I recently pulled my cooling lines from '97. They appear to be in great shape...no leaks or anything. With all the concern on here about leaks and fires I decided to replace them with new and wrap them with the thermal shroud. After doing this I heard from the folks at my local LR shop that they are willing to simply replace the rubber on them at a substantial discount. (Geez thanks guys for not telling me until after I had installed the new ones...
SO my mistake may be your gain. If you have concerns about your lines you can get mine and have them reworked with new rubber and even add some extra protection to them and install at your convenience during your next oil change.
Please note these will likely only work on the '97 4.0 engine... it is my understanding that these are different from what is used on the other years.
If you want them let me know.... toss me a few bucks for the hassle and the shipping cost and they are yours.