John;
When I was looking for the same stuff a few months ago, the "collective" recommended these... I picked them up on Amazon:
https://www.amazon.com/gp/prod...00?ie=UTF8&psc=1
https://www.amazon.com/gp/prod...00?ie=UTF8&psc=1
https://www.amazon.com/gp/prod...00?ie=UTF8&psc=1
I've only used the single white line for some parking spaces so far and it looks great.