Whow, found this on the japanese auction house:



Sets available for these models:
ＢＭＷ　８８年から９５年ぐらいまでのＥ３４　Ｅ３２用　５２０ｉ　５３０ｉ　５２５ｉ　５３５ｉ　５４０ ｉ　７３５ｉ　７３５ｉＬ　７４０ｉ　７４０ｉＬ　７５０ｉ　７５０ｉＬ　ツーリング　セダン 　など
fuel consumption is japanese style = xx km/Liter

Price probably about 140 $ (depends on auction end) plus shipping within Japan.
I should open a shop.