Side mounted number plate light

Hi guys, I have put this in my intro to me, but thought I should ask in this topic.

Where can I get number plate lights (side mounted), and are they easy to fit? I am worried about fitting them and buggering up the electrics (may need to speak to my mechanic).

I have looked in a lot of places, but can't seem to see anything for the lights only. I am hoping that you guys may be able to direct me to a supplier.

Quite a few choices on here https://www.bikermart.co.uk/products/NUMBER-PLATE-LIGHTS

Thank you. I'll have a proper look, as you say there are a few there.