  Single-top-squark production via q q' -> \bar{\tilde{t_1}} probes
R-parity-violating extensions of the minimal supersymmetric standard model
though the \lambda''_{3ij} couplings. For masses in the range 180-325 GeV, and
\lambda''_{3ij} > 0.02-0.06, we show that discovery of the top squark is
possible with 2 fb^{-1} of integrated luminosity at run II of the Fermilab
Tevatron. The bound on \lambda''_{3ij}$ can be reduced by up to an order of
magnitude with existing data from run I, and by two orders of magnitude at run
II if the top squark is not found.
