Thanks Grant
Two of those are on my favourites, while Ply33 efforts are for a swap of a fluid filled capsule from a donour gauge to an original gauge my hands are tied on going that route as the replacement donour capsules are 9.5mm wide and it has to go in a 8.5mm wide fitting on a coolant line. I travel to the US often so having a friend hold the ether for me is no problem. Good old ebay. Here is a good article and pretty much the route I am going.
http://www.170v.de/yabbfiles/Attachm...ev1-022014.pdf