Originally Posted by
wroomwroomoops
I know of no track frame that would have a deraileur hanger. Your best bet is using a gear hub, like the Shimano Nexus, SRAM Spectro or the Rohloff Speedhub.
EDIT: geometry wise, I don't know if it would be a good idea or not. I am sure it can be done, though. Just use gear hubs.
gotta be this, or crit frame, or tri frame. the only problem is that the set up for one of those hubs (excluding rohloff) would cost as much as finding the right frame.