Well this is one method to address the problem - the other method is replacing the stock bulbs with LED to increase the brightness.
I have send the guys at Speedhut.com an email to see if they make these in KM/H also and here is the reply
So there you go they can do them in km/h or both if you like just $10 USD extra which is not too bad. The stock pricing is $89.95 USD + shipping.Hi,
We do offer Km/h for our gauges! We can also offer Km/h outer and MPH
inner scale if preferred. Please state in NOTES that you would like
Km/h (or Km/h outer and MPH inner). Please include your Km/h top speed.
There is a $10.00 charge for Km/h.
Thanks,
Speedhut.com team
I have attached some pics of these installed in a LHD 240z also note that for the demo the standard lights have been disabled so the needles don't show up. I have also asked Speedhut if they can do the volt member/fuel gauge aka 260z gauage - will post the answer once I get a reply.
Regards
Mike