The Peninsula Corridor: San Francisco – Gilroy route features Caltrain’s workhorse Electro-Motive F40PH-2CAT and stylish MPI “MPXpress” MP36PH-3C diesel locomotives as well as the railroad’s Nippon Sharyo and Bombardier cab car and coach bi-level commuter equipment.
The MP36PH-3C is "pretty close" to the Florida Tri-Rail BL36PH (BMEX) 818-829 series diesels. I wonder if anyone would like to tackle a reskin. The CalTrain textures look very reskin friendly to me. I can also supply reference pictures and logos. They would surely look nice on the Miami route.
Harry