There is an Argentinean Latin rock band named Nomataras. Don't know if that has anything to do with the group you are looking for. It's the only one I could find.
Nomatics?
I'm in the midst of Jonathan Franzen's _The_Corrections_, and one of the characters lists off some music by some bands he's listening to, including some I know and like, such as the Minutemen, and includes a band called the Nomatics. I'm wondering if they are real. Anyone heard of 'em? Nothing pops up on Google.