I was just going to point you in the direction of "mikeythemini" for a red bulb with a white reverse light as he has supplied bulbs & possibly lights for other users on here so if he hasn't got anything on the website send him a PM.
Check out "mikeythemini's" website.
(
NewMINIStuff.com)
As usual I'm too late
because if you followed the link by "Drewuk" post #6, it states it in that thread somewhere
.