The lesson that I learned after paying too much money to rebuild my Nico-Fico traveler (I got rid of the fixed stops, and made it adjustable) is that I should have caled Garhauer in the first place.
Guido, the owner at Garhauer, could have provided me with a complete traveler (track, car, end blocks with cam cleats, and control line) for less than I paid for a traveler car with 2 control sheaves and beckets from RigRite ($555 in 2012). The other reason is that a flat traveler track is vastly superior to a curved track.
You can search the RigRite website to see if they have what you need. However, I suggest that you simply call Garhauer.