So you know I bought a single 'click deco' brand dolly light switch a while back and found it to be pretty poor quality so it was returned. Ended up with these: http://www.forbesandlomax.com/the-unlacquered-brass-range.html Really good quality and they have lovely finishes too. I quite like their antique bronze range too as it contrasts nicely with chrome/nickel finishes without clashing. If you'd really like everything to match then take a look at the Jim Lawrence range. They're not the cheapest but offer both light switches and door furniture in a large selection of finishes. They also do the narrow style of light switches which I think looks really elegant in older houses. https://www.jim-lawrence.co.uk/door-window/door-handles-door-knobs/bromley-handle-with-bristol-keyhole-backplate-in-510201bw?returnurl=%2fdoor-window%2fdoor-handles-door-knobs%2f%3fcount%3d36 https://www.jim-lawrence.co.uk/1-gang-dolly-architrave-switch-in-chrome-with-3279chniz https://www.jim-lawrence.co.uk/2-gang-black-dolly-switch-bevelled-plate/

Well I found this tutorial for making one that might work? It's american but I imagine you can get the same bits here: http://thepaintedhive.net/2017/02/diy-mini-barn-doors-a-complete-tutorial/ Or create something similar to this pic?

Take a look online at www.hafele.co.uk It’s a trade only account but you can see what’s available although it will not show you any prices. If you see something you like give them a ring and ask them for a local supplier. They do really cheap up to really expensive. Alternatively let me know the 8 digit code number and l will tell you the RRP.

I like black (we've planned black) but I think it only works with a strong colour...the overall vibe needs to be modern.  Sage green is quite pale isn't it? More of a gentle modern country vibe perhaps? I would imagine the nickel would be much more suited in this instance.