I think you are refering to an Ankarolina, a web anchor
line on a reel that can also be used as a jack line.
These are still avaliable at:
An American version is also avaliable at:
We used one for years as a stern anchor
line while sailing the ICW
and ran it around the deck
using the deck cleats
when we went off shore.
They are pricey if you are just going to use them as jack lines.