Last Time I suggested band names here I made a Huge list of names and recieved some serious flack from all parties involved for what I thought were pretty creative names. So at the Risk of repeating that endeavor, I'll list some good sources for name inspiration instead.
1. Character names from obscure Movies/cartoons
2. Professional Wrestlers
3. Cereal (the stuff you at at breakfast with milk)
4. Industrial equipment
5. Something Goofy and the Something else Goofy's (aka Captain Crust and the Supernaturals) <- already taken but you get the idea
6. Being a 90's cover band, you might Look to 90's pop culture for ideas. However, unless your covering Grunge/Hardcore/Punk or Rap, I can't possibly think of what you would be covering that wasn't horrible from that era. Industrial equipment names were big in the 90's too. Helmet, Fuel, Tool, Chokebore, Nine Inch Nails, etc....(see #4)
If you tell us the general Genre your covering it might help narrow down the name search a little
