Thread adaptors for fitting SPA gauges

[Hard-Drive]

My temp gauge has never worked properly and I've just bought a SPA design dual oil/water temp gauge from my neighbour who was breaking his track car. It's one of these and is rather nice...

My truck was a 2.5 N/A 110SW re-engined with a Disco 200Tdi.

Thread size on the SPA senders is 1/8 NPT. I need two adaptors, one to replace the plug in the top of the oil filter housing, and the other to replace the existing water temp sender unit on the thermostat. Of the two types of thread fitted on the thermostat, mine is the finer one (sender part no. is PRC6790)

Can anyone tell me what these thread sizes are please? Thanks in advance.

 

[zeaphod]

If it's a similar fitting to Durite gauges, have a look here: http://www.vehicle-wiring-products.eu/section.php/125/2/durite-vehicle-gauges-fittings

 

[Hard-Drive]

Cheers zeaphod, but those nice chaps at Steve Parker have come up with the goods. You have to laugh, one's metric, one's imperial, and of those one is available in two different threads!