Just picked up a genuine pair of 2019 rear lights from EBay. One has a broken lens but I’ve also managed to buy a lens cover from Powerful. £403 all in.

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....No updates, how did you get on?. 2014 L405 3.0 V6 Autobiography Santorini Black 49k

Hi

I've done the lens change,

You have to snap off the old lens, you won't be able to loosen it by heating it,

There is a locator groove all the way round the light where the ridge for the lens sits in to, you will have to clean the groove with a dremel as the ridge on the old lens will be broken off in the groove

Lastly bond the lens, try not to tough the silvering in the lens.

Hope this helps