Have a question about U2 tribute bands?

I've heard of two U2 tribute bands, called Mysterious Ways and Vertigo. The first one has played in Dallas many times, but I don't know when they are planning on playing here again. Vertigo, I have no idea..I googled them but couldn't find anything. Is anyone out there a big fan of either of these bands and knows their schedules for the rest of this year? Thanks.