Sorry, I've probably explained badly. I want a 1/8bsp forster one way. All of the ones I've found are 28mm length. I'd like one at about 22mm total length, as I need it for clearance. I found one at the correct length, but it was 8mm not 1/8 bsp.
I did buy one of the 1/8 best fittings one, but it is also 28mm.

The link you posted is the 8mm one I found...right length, unfortunately wrong thread size.

Rob