i don't know if this conversion is possible or not....this idea just come into my head
here is original pic: http://i278.photobucket.com/albums/kk115/rdp_lightning95/hidekazu%20auto%20art%20and%20tuning/bmw_3series.jpg

and here is the chop, i hpe you like it

high resolution: http://i278.photobucket.com/albums/kk115/rdp_lightning95/hidekazu%20auto%20art%20and%20tuning/bmw_3seriescopy.jpg

back door looks a little off but not bad indeed

a lot off if you ask me, but generally the car is sweet