Limits on Exotic Quarks in the SU(3)xU(1) Extension of the Standard   Model from SUSY Search Data
  We study the $p\bar p$ production and decay of exotic quarks that are predicted by the SU(3)$\times$U(1) extension of the Standard Model. We show that recent experimental searches for SUSY particles at the Tevatron limit the mass of these quarks to be above 250 GeV. Run II will extend the reach to 320 GeV. This is one example of SUSY search signatures that apply directly to another, quite different, new physics model. 
Prashanta Das, Pankaj Jain and Douglas W. McKay