The best looking one with very solid built metal and similar textile will be the Gariz Gold or Gun Metal soft release buttons. Only Artworkfoto bring in the Gold colour one, and cost around $70. You can order the gun metal colour one from ebay.
I bought 1 previously but sold off as I am using full casing and thus it presses on the button often, with once that I forgot to switch off and the camera battery totally flat since it is constantly "On' as the button was pressed and it does not go into "sleep" mode if you forget to switch off. I was also worried that this will cause problem if I constantly pressed on the button via the full casing.
So I am back to the nice small soft button, flushed nicely to the button with no gaps at all. This one can get from Decameraconsultant. Very nice uncle who specializes on rangefinder and repairs.
Not sure about your style and preference. I prefer everything same colour. My X-E1 is black. All other accessories are black. Same type of black and same texture/style if possible.
If you like bright red, gold, big buttons, there are more choices!
