I was lucky and bought my bootlid of a forum member. Mstyle sell them although I'm not to sure how good the fitment is.
I prefer the amuse ericsson type bootlid but not to sure how it will look on a non M as its a little bit more aggressive looking.
E63 M6 - Matte Metallic Blue, BC Forged HB29's, Eisenmann Race Exhaust - SOLD
BMW 640d Gran Coupe