Having been asked what I wanted for my birthday, I provided the following link to my family in the UK. My indicator lens is cracked:

After a few weeks of waiting, I received the following in the post forwarded on from the supplier:

I suppose at least it is 'genuine' in that it is a Lucas part, just not the one I want, or brand new, or amber.
With a bit of alcohol, the colour rubs off easily, so a spare sidelight will be handy.
Here's a comparison:

Amazing what people will try to get away with.