This hat can be used as custom item for Minifigs. It''s modelled according to drawings of French line infantry units of the Napoleonic area. Since many units of this time were using this design it can also be used for Austrian, German or other nations.This design already implements a wall size of 0,8 mm.
Take also a look at the much cheaper packs section
or ask for one if it's not available.
(Please beware: only the custom item is included but no Minifg)