I've been looking for quite awhile, too. It's just strange what gets remastered and what doesn't. I was thrilled to see the whole back catalogs of Dire Straits, XTC, the Police, Pink Floyd, and (to a lesser degree) Van Halen. But I'm mystified as to why Bon Jovi gets remastered buy Def Leppard doesn't. Likewise, of all the weird stuff that is remastered (eg., King Diamond, Merciful Fate), I haven't seen anything by U2.
I agree that most of the U2 catalog sounds pretty dreadful. I have the Joshua Tree, and it's a pretty bad sounding disc. You can't really blame the CD technology of the time, as there are a lot of really superb sounding discs dating from that time period. Not sure why it sounds so thin.
Why not at least a Gold Disc remaster? Strange that MoFi never released one (to my knowledge) back before they went under.