Looking forward to you completing your quest Taz. Interested just to see the rarity - bit of a selfish perspective but there you go, you'll just have to forgive me. Just one note: you're saying all MCs are LF denominated, which is fine - mine is too. But if the numbers are LF78000-LF78655 (you're right so far, mine would fit somewhere in that list), you'd have thought there'd be 655 M coupes. I have previously a seen a table published on here which detailed the overall UK numbers of Z4s, broken down into roadsters, coupes and the various engine sizes (I've saved it somewhere) - and that table showed approx 1000 M Coupes, which doesn't sit well with the numbers above. I'm sapphire black and recall there were 120 of them - hence my pos the otherday about finding 40 of the - which we've worked out was US production, I think. I am genuinely urging you on in your task so feel obliged to point this all out - I am hoping you have a good reason to reassure me/us with!
Stevo