Parts required for DC-3 project

I’ve been asked if I can locate the following for a potentially flyable DC-3 project:

Brake units
Narrow-chord (needle) propeller blades

Items to be in good condition, though not necessarily serviceable, but which could be re-used, i.e., not damaged or scrap.

Hope you can help (probably one for our US friends):).

TIA, Anon.