Most recently, Atlas has been doing these cars in 4 road numbers. You can call them 8774731968...but they probably arent sure either. I think 4 road numbers is safe.
Also have the earlier Hooker orange 17,360 tank cars in stock (2 left), and a number of the Occidental (HOKX) tank cars from prev. runs in stock.
When it comes to car numbers, I never send anyone 2 of the same number, unless they ask for that. (I've answered this question a million times. Who sends ppl 2 of the same road number? )
Answer to Weaver RSD-15 question...Weaver never made an RSD-15. It was the RSD12. Same carbody as the RS-11, with alco trimount 6 wheel trucks. Atlas has the tooling. I have about a half dozen of the Weaver ones here...
As for the M&E SW1500......I'm doing a special run of the M&E RS-1, in the red (later ) scheme. The Railking scale RS-1 is another of the late tooling, really nice scale engines. Im doing it in 2 road #'s. 15 pieces of each