I have got a shifter cable that would be spot on for a bec installation.
It comes complete with a lever and can be made to fit a locost (or other) chassis very easily.
Here are the dims
Overall length 130cm
width of flat but that mounts to chassi 80mm x 80mm
lever length 140mm
mounting point for the cable is 75cm from lever end
17mm hole req for bulkhead fitment
there is a small bit that has chaffed through the casing to to steel outer braid but it still shifts nicely.
cast ally pivot housing.
Image deleted by owner
Image deleted by owner
Image deleted by owner
Image deleted by owner
£45 posted or it will end up on ebay.
Cheers