- I already mentioned the Hudson in the other post you made. (https://digitalrailroadingco.powweb.com/dr/motive-power/steam-locomotives) - Streamlined K4 does not exist, but would be nice. There is the unstreamlined version that does exist though, (https://store.steampowered.com/app/65247/Train_Simulator_PRR_K4_Loco_AddOn/?curator_clanid=958135) - N&W J class does not exist, since the Museum that owns 611 put copyright saying she can't be reproduced commercially in any form without permission and a small fee. - Darlan Gomes has a basic C&O L1 that he is working on. - Darlan Gomes is also making the S1.