Maybe They Didn't See You

I had some library material due in the coming week, so I thought I would combine a Sunday morning ride with this errand. The library was closed, so I went to the drive thru. There was a slot for adult, children, and video materials. Above each slot was a sign in Braille.( Makes you say hmmm, ) So maybe that driver who said they didn't see you wasn't unobservant. Maybe they were on the way to the library. Now my question is; Where do I get a motor scooter sign in Braille?