Probably going to be hard to find. It was meant as an alternative to LCD displays and uses the same general types of drivers, just different driving signals. CrystalFontz is the closest I found and those are full development board biscuit PCs with an OS and everything, sure you could interface it with a PIC but what's the point when you have real processing power behind it already? LCD technology started at it's infancy with simple segment displays and worked up to dot matrix character displays, so the technology is still easy to find. No such onus was placed on e-ink displays, they started right from the bat at high resolution displays, there was only a minor learning gap from adjusting a few of the elements to adjusting tens of thousands of them using existing manufacturing techniques.
If you want a simple **broken link removed** e-ink display like older style segmented LCD's then you'll have to spend the money on em, or hack existing ones.