I think your best bet is just to buy a 2nd hand vent and get it painted. howmanyleft.co.uk is showing only 372 le500's still registered in the UK and how many of those left are vibrant orange i have no idea. I think i'm right saying that any MGTF side vent will fit (someone will put me right if i'm not). Getting one resprayed vibrant orange shouldn't be that expensive and will be a lot quicker than waiting for one to turn up somewhere.
I think your best bet is to buy a pair of black vents and fit them............they wont look to out of place for a small price.......you can decide on painting them later
check out the car below..........
