I am assuming this may be the original fuel shut off but I tried to turn it off and it's now stuck closed.
It's always looked a bit damp so I want to replace it rather than strip it and see if I can free it.
I can't see anything like it at Whitworths or another Marine shop I tried and nothing on Bunnings online so am wondering if anyone can point me in the right direction?
It doesn't have to be the exact same at all, I just need to be able to turn off the fuel if needed so something on the same principal will do.
Its 5/16 on the barbed end and probably 1/2 or 3/8 or the screw in thread but I won't know until I drain the tank and get it off tomorrow.

Cheers