I would get with Kev at The Station Masters Rooms. He seems to have the best selection of second hand and mint Asters in the planet. Nowhere else online seems to have the selection he has, even when his selection is low. I have seen most the USA style engines turn up there from time to time. I just bought an Aster Schools from him. I myself am hunting the matching passenger coaches Aster made for the Schools. Their shorter length and tinplate style compliment the Schools engine better than the BR mk1's from Accucraft do in my opinion. If you have the cash set aside for an S2, I would start posting a wanted post where ever you can, from forms to fb to the NL&J. One will turn up.