Halfords can generally mix up any paint you want if you ask at the parts desk,either as an aerosol or touch up brush,I was suprised when they mixed up some sahara beige for my 02 and it was a perfect match.
Don't be put off by the scrap it/torch it brigade ,E30's are old cars now,with a finite example left on the roads,true there are probably more solid examples out there,but I thought this was a forum for enthusiasts ?
Enthusiasts don't want to destroy the very thing they are supposed to cherish
Must be a BMW thing,as I found the same on the E21 forum.