There might not be much on the market (thank you MTH for your Railking PCC and Semi-brills!), but with a bit of imagination you can scratch build your own I suppose.
I just finished 3D printing a prototype for an interurban car I am making to fit over a MTH PCC car base (smaller nozzle next time for the detail). A few changes to the lights, fitting the final shell to the actual base (plus bottom detailing), some dummy couplers and it'll look pretty nice!