I ordered mine from
Amazon - $2.59 each! I have plenty of horror stories of the "helpful" folks from O'Reilly/Autozone/Pep Boys etc. and their cross-references.
Funny story - yesterday I was looking for gear mesh indicating pigment to check mesh of my ring and pinion. I went into an O'Reilly's not expecting much. Counter guy asked what I wanted and I said I needed gear mesh indicating pigment - white lead, Prussian Blue, yellow, whatever they had. Got the fish face. He goes up to his computer and the first thing he says is "what car is this for?". I gave up. Went down the street to another, old-time independent, they immediately knew exactly what I was looking for and had a box of several tubes of Prussian Blue on the shelf.