Just order paint from Australien for the interior.
They have the TautFlex paint, it works great.

viponds.com.au/tautflexbenz.htm

 

three years ago I disassembled the dash, removed the console and stripped all those hard plastic parts of every little bit of the peeling original oyster color with alcohol and re-dyed those parts with "forever black" from performance products. It still looks like the day I did it. very durable.