We are partnering with Eric Courtney of Miniatures by Eric for two resin-shelled trolley kits. One will be an East Coast prototype and the other a West Coast prototype. Both will be priced reasonably!
The East Coast Prototype has been announced as the Boston 3172-3196, 3222-3271 series PCC. The kit will allow modelers to finish the car with or without the full length fan shroud. See next photo:

Both will have metal floors and will use the Bowser traction mechanism. Accurate decals will be available.
Note: We will be announcing the west coast prototype kit as progress reaches a point where photographs can be supplied. Both Custom Traxx (George Huckaby) and Miniatures by Eric (Eric Courtney) are welcoming constructive inputs from modelers knowledgeable in all facets of Boston PCC cars. We expect this kit to be available before the end of the year.