So I just had an idea, see this:

Maybe, just maybe, this would work.

you’ll need an antenna tuner because reasons, and probably extra strain relief, but think about it.

need a 10/20/40m antenna?

hook up two 10m cat5 lengths!

you could keep it in a bag, and go off camping or to a field day, forgot your cables?

no prob! head to a nearby electronics store and grab some ethernet of the length you need!

where the cat5 jacks connect to the pl-259, all wires are used in the cat5.

JUST DONT GO PLUGGING THE OTHER END INTO ANYTHING HAHAA