Battery box rubbers ....

[rphillips]

Naw, neither of those tool kits are worth $15.00, barely worth $4.00. Well maybe if you're in a pinch.

 

[xkaes]

For an emergency, roadside repair, some string, twine, rope, wire will do.

For something more permanent, use your rubber inner tube and put grommets in it -- or use you imagination. Necessity is the Mother of Invention.

I've bought two over the years for just a couple of bucks on EBAY.

 

[Gorminrider]

If you still have the original seamless metal rings ,use this hitch to attach the rubber loop.

 

[argonsagas]

Quickest and cheapest way I can think of is to use a small section of tube and a pair of fence staples. Just cut off the width of tube you want, keeping the tube portion intact, flatten the tube across the battery, slip a staple into each end and use it as a standard keeper.
Fence staples are strong and will not bend with the amount of force the rubber tube can exert.
They are long enough to do the job and of a diameter that will slip into the retaining grooves at each end of the battery box where they will be invisible once installed.


Edit:
You might want to dull the tips of the staples before use to avoid scratching fingers.