Bussinger Trains in Ambler, PA is showing 7 of each on stock. They are a small shop where everything is MSRP and are showing 7 of each in stock for $104.95. If you are buying several ask and you may get a bulk discount. When you stated all the forum sponsers were out I checked Hennings and Nicholas Smith just to confirm and then remembered Bussinger carried Atlas products. I used to buy rocket engines from them but only one or two train items I couldn't find anywhere else...probably because they are a MSRP shop and their website used to not have inventory listed. Their phone number is 215.628.2366.
-Greg