Ken, If I remember correctly, back in the mid-70s, your production racer was a BRG/"mid-dark-green", right? What was the vendor for your components? Did you obtain those items in their colour, or did you paint them yourself? If you painted/had them painted, did you attempt to match the Fastback BRG at that time?
BTW, I recently found a copy of my receipt from "Newtown Products, (Redditch), Ltd" who supplied the original NorVil items for my 850 PR. I ordered them through the NV purchasing office when I worked there. I don't remember if they obtained them for me "at cost" or if there was an employee's discount but my tank was £12.50, including fuel cap. But I didn't get a super deal -- they charged a 10% surcharge for the special Signal Red colour! The glass fibre front mudguard was £3.75 (plus the surcharge which took it over £4). How did I ever raise those breath-taking sums?
Best regards, Bruce Henderson (now in North Carolina)