This may sound stupid but have you tried a DuPont store (not an auto part store)? The reason I ask is I paint M/C's for a living and DuPont usually has BMW M/C formulas, if not in DuPont, Spies which is their European line. I can mix(744/Pacific blue) in Sikkens which is a comparable product to Spies. Maybe you just need a full line PAINT store. Hope this helps.
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