I don't know if they are the same, but I replaced the traveler on my Prindle 18 last year. I had to drill out the rivets on the end cap to do the job. If you don't have a rivet gun to do those bigger rivets, and don't plan on doing lots of them in the future, there is an inexpensive gun at Harbor Frieght that will do the job. I think it's under $20.00. The new travelers have rollers on the guides, so it is much easier to adjust the traveler when it's under pressure.
Good luck,
Jack