currently I have a speedo overlay in mph but at night it's totally unreadable.
4dx clock sets are like hens teeth/rocking horse poo.
the gold speedo converter has been discontinued.
If you can find one second hand they go for about 30 quid AND they reduce the sweep of your speedo needle.
You also no longer have an accurate representation of the km's completed on the clocks.
I approached lockwood dials. They can make up a new speedo face from my existing one.
this would mean you keep the sweep of the needle as is. your km's reading will still read in km's and be accurate but the speedo itself will read in miles per hour. This will be a direct copy so keeping the original look of the dial set.
a one off face is £150 +vat

but as a group buy these are the prices :-
"we can do 5 for £37.00 (+vat) each or 10 for £36.00 (+vat) each"
I'm happy to arrange/co-ordinate it if anybody else is interested.