Honeycomb flat chrome fog

[ProtoTipo]

But you'll be able to fit a reverse (white) lens.
(I've got some flat honeycomb reverse lenses):
Here on Italian ebay, the seller will ship to the U.K. for €25:
https://www.ebay.co.uk/itm/163192913047 (https://www.ebay.co.uk/itm/163192913047?ul_noapp=true)

I did buy one from this seller before, so here's some photos to illustrate how the chrome effect is likely to look:

[ProtoTipo]

Oh, and some red flat honeycomb lenses here, but I guess the LED trickery has made these much less sought after?:

https://www.ebay.co.uk/itm/Trasparente-Plastica-Fanale-Posteriore-Retronebbia-Universale-Aric-122-x-63/163390313777?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

The seller will post each for €12. It looks like there's 2.