There are companies that cut to size, and ship anywhere, so it seems, by what I've come across on google. Maybe contact this place : http://www.professionalplastics.com/
All those little flags looked so festive, that I spun round and round in my swivel chair. Felt just like being at a theme park.
I doubt this helps, but I've heard from some that black paper phenolic has also been called 'ebonol '.
If you do finally find a workable deal from a supplier, don't forget that maybe you need some other plastics materials too, like white rod for dots, etc