Where can I buy stylish switch plate covers please?

I am looking for stylish switch plate covers in bronze or copper for a 1910 maison Bruxelloise.

(I assume it's best to buy these in Belgium as opposed to the UK so that the electrics are compatible, or are these things standardised across Europe now?)

Anyway, any ideas where these can be found. I want to replace our standard plastic Brico ones!

Thanks for any help or advice.

Any recommendations regarding good lighting shops for period homes would also be much appreciated.

Thank you!