Nice kit Jim.
I made a very long release cable for my gas cap that runs from the driver's door jamb, around the rear of the car, and to the gas cap on the passenger's side. I got the cable housing from a local bicycle shop. It is the housing used for bike hand-operated brakes. They sell that cut to any length from a spool. Unfortunately they don't have the cable for inside in any length. That cable (1/16" dia.) is available at the local Ace Hardware from a spool, cut to length.
I made ends by using crimp-on electrical wire connector lugs that I crimp on then solder. For locations that need only a lug on the end of the cable, I used just the crimp-on suction of the lug and cut off the ring part. In other locations I used the ring style connector for a 1/4" bolt so I could attach the cable to pull a bolt at the part needing a tug.
This is just a home-made solution to getting long cables.
RT