Is there such a thing a multicore coax?

[leadbelly]

What I could really use is a multicore RG-6/U so that I can run more than 3 signals in the small conduit between my garage and house. Is there such a beast?

 

[moamps]

Maybe Belden 1279P?

 

[dnsey]

Check out suppliers of PA & recording gear.
All sorts of multicore 'snake' are available in balanced and unbalanced varieties, from 4-way to something like 64-way.