Hello Sam (Holmes) ---
You are very correct about the SIRT "ME-1 Cars" in O-Scale -- and the "how it got produced" with your strong input to Joe Ogden at Island Model Works. Also, Joe Ogden has long been a member of my NYC Transit Modelers Group (Forum Board) and there was a movement at my group with Joe-O to also get the SIRT car produced. I and Steve Davis worked with Joe-O on the Body details and refinements - Steve took EXTENSIVE detailed close up exterior photos of the one car at BERA Musuem including under the car and up on and along its roof, of which I have all copies of. Steve and I and a few of my NYCTMG members pre-ordered and purchased the SIRT car in O Scale (I ordered and received 2 cars).
Steve and I also worked intently with Joe-O on the production (and body details) for the O-Scale IRT 1939 Steinway Low-V Car Bodies, and the BMT 3-Unit D-Type Articulated Subway cars. Originally on those D-Type Triplex cars, the roof profile and end details were somewhat slightly incorrect on the pre-production "pilot" master bodies, and the roofs were changed to correct appearance by Joe-O at our insistence. Joe Ogden works well with people in such matters !
If Joe-O were to produce O-Scale Broad Street (pre-war and post-war) cars -- and Market EL (pre-war and post-war) cars, I would order a few of each ! So, it is up to others who are interested, to see if the needed minimum numbers (about 30 cars of each type) can be conjured up, with guarantees of $$ deposit pre-orders -- (money talks and B--S-- walks, heh) !!
regards ! - Joe F