I bought a pair of smoke tail-light tint film (30%) for my Z4 but after I received it I found out that the film would only fit '06~'07 Z4/MZ4's but not my '05 3.0i.
It's the same tint film from headlightarmor shown in this thread:
http://www.zpost.com/forums/showthread.php?t=76922
Brand new they cost $47 ($39 plus $8 shipping). I'll let it go for $25 shipped in the USA.
For pictures of the actual item, please PM me your email address.
Thanks.