Dorman's great IMO, I have their lines on both my XJ and my MJ with zero complaints. I picked up 1x 624-300, 1x 624-301, 1x 624-334, and 2x 800-714 (the tranny fittings, which were rusted into useless blobs on mine) for each vehicle for about $70 on RockAuto. My only complaint is the damn quick disconnects, which after 13 years of road grit and corrosion are neither quick nor disconnects. Ended up cutting the one for the lower transmission fitting off and just using fuel injection hose clamps.
The ones on my XJ were leaking badly and rusted so badly I broke them in half removing them, the ones on my MJ had been cut and patched in at least four places using vinyl aquarium tubing (wtf?!?!?!) by the previous owner - I got the vehicle cheaper than I probably would have otherwise because he thought it had an oil leak, turned out the tranny line had a pinhole leak that was squirting up onto the side of the engine and dripping down, fixed it in his driveway and drove it home. It was time to replace them.