I found it a lot cheaper just to make my own pull pull. I went to walmart and bought teflon coated leader wire rated for about 40 lbs it comes in a kit with the crimper and crimps. Then just buy some threaded couplers and drill a small hole in them to thread your wire through. I then connected the threaded couplers to ball links. I did all of mine in 2 56.

The kit I bought cost about 8 dollars and I made 3 pull pull sets with it and still have plenty left over.

After I took that second picture I added heat shrink tubing to the threaded couplers and it gives a very neat appearance.