OK well after much research and a bit of luck, a new aftermarket supplier has launched chrome side repeats for R55>. They are LED type and look pretty neat, but IMO, are staggeringly expensive for what they are especially when I could get R50 types (non LED) for a mere 6 quid.
On the plus side, they arrived, without a duty bill from the post office, fitment went OK, and they work.
I changed the side scuttles to genuine JCW
chrome type at the same time - I like a bit of bling.
From my experience I wouldnt want to put aftermarket lamps on an aftermarket scuttle as the tolerance stack up would give you a 50/50 chance of the damn thing fitting without hours of fettling...
Anyway heres some pics of the before and after and theyre on ebay (sorry no URL - Im a newbie so Im not allowed to post them...)
.ebay.co.uk/itm/R55-R56-R57-2007-UP-LED-Side-Repeater-CH-for-Mini-/360314333988?pt=UK_CarsParts_Vehicles_CarParts_SM& hash=item53e4686b24]R55]R55 R56 R57 2007-UP LED Side Repeater CH for Mini