Ok here's the story behind it. I've pulled down my A14 and 15 and I am going to get the 14 freshened up first. Gave it a few quick measurements and it came up with a 77mm bore, and for the life of me it looks sleeved!

Anyone got a set or mabey point me in the direction of someone who does?

Doesn't have to be flattop or nothing, I'll save the better stuff for the A15. I've been scouring ebay and lately they're not showing up so it may be days or weeks till someone relists a set.