I can't remember what brand the flares are, I got them about 18 years ago when they were the only wider aftermarket XJ flares on the market. That was well before Rusty's, the Jeepspeed body flare and 10+ years before Bushwackers. They are made in Germany and are part of a complete body kit for the XJ (kind of like the flare and body kits you see on a lot of customs vans). They were made for street Cherokees to give a lower, wider look. I bought them from a guy who spent time in Germany and brought 2 sets back. The other set were on his Jeep.
He was able to buy just the flares separate from the rest of the kit that included a lower front spoiler, rear valance and side skirts (that must have looks hideous).