Oil temp gauges for oil tank?

[Ishrub]

Does anyone know if the now unavailable Triumph Rocket oil temp gauge for oil tank is the same diameter plug as the version for the HD SoftTail '00 up?

CUSTOM CHROME Oil Temp Dip Stick
AUD$59.95 Approximately US$46.19 FREE Standard Shipping in Australia

CUSTOM CHROME Oil Temp Dip Stick S/Tail'00up

 

[Ishrub]

Come on, some of you Captains can confess to be closet Harley owners with a HD SoftTail

Found this thread but hardly conclusive.
R3 Oil Temp Guage-Triumph Accessory?

 

[Ishrub]

Found a Rocket version looks identical

US$55.69 First Class Mail® International: US$16.02 to Australia Aprrox AUD$97
Oil Temperature Gauge Triumph Rocket III