The perfect 5
 

Has anyone found, or considered asking a company to make available in a tube, the perfect grayscale number 5 gray? It would save a lot of time mixing if I had this as well as white and black.

Have you tried studioproducts? (start at the bottom.)
Rob has made a grayscale set and one might assume if you asked sweetly he might send out a #5.

The whole scale! This is handy. Thanks, Debra. :)