Euro tail lights are expensive for the Bmw E34... And the
following modification is not allowed in certain states (don't
ask me why).
The trick is to have the whole tail light looking red. You
just need to paint the side indicator of the tail light red
or whatever color, but I strongly suggest red.
I bought my tail light paint from a local hardware store,
I bought some glass paint on spray, you don't need to use
a lot. (Black, green, blue, red) available.
Cost: Glass paint spray $10 - Polyurethane spray coating
$6 (can be found in hardware stores).