Can the centripetal force be inverted?
Close to a black hole, but still outside the event horizon, orbiting arbitrarily fast, wouldn't result in a circular orbit, but in a trajectory towards the black hole.
In this extreme scenario, centrifugal force could be interpreted as attractive.

In more usual settings, centrifugal forces point outward.
Since the centrifugal force (in usual settings) $m \omega^2r$ is proportional to square of the angular velocity $\omega$, you would need an imgaginary angular velocity, or alternatively a negative mass to get an inward pointing centrifugal force.

I'm not aware of a physical realization of imaginary angular velocities, at least not for circular orbits,
although this paper introduces imaginary velocities for hyperbolic orbits. This may be derived from imaginary circular angles.
Negative masses aren't entirely impossible, but those potentially feasible are too tiny to be of any practical value in your sense.