The pinrestore braid seems quite large 1/4" (6mm), and the braid under most playfields looks more like 3mm wide.

I recall the braid i found via the slotcar suppliers was in 3 or 4mm or 6mm, but once again O/seas.
Some local slot shops have it, but PRICEY, it's cheaper to import it yourself ;-)

Surely that braid must be used somewhere else? it's gotta be some kind of grounding strap at Electrical wholesalers, or somewhere similar?
I just know i'm gonna walk past it one day in a hardware/garden/auto/toy store, and it'll be a 10metre pack for $2.... 

It's gotta be out there......maybe Auto shops? Autobarn, supercheap etc???

Hmmm, searching, searching......
MM.