Got an oil pressure gauge mounted in centre console of my dash in my Sapph Cossie. The problem is that the pipe that goes into the side of the engine is beginning to leak oil from the joint.

When i stripped it down i've found that the olive is knackered and in need of a new one.

The problem is that the pipe is roughly 3-4mm in diameter (have measured yet but can do), and i'm stumped where i could get a replacement olive from as that is a really small size?

Anybody know where i of a place where i could get an olive that small??

Thanks