Ian - Saw one on Ebay for £10 squid so will see when it arrives if it is ok for the job. Thanks for the offer though. Appreciated.
Ron - I like trawling Stuart Bray, that is where I got my M20 from back in 2008. Also picked up a spare oil pump and a few odd items about 8 months ago.
Random - Didn't crack it myself. It was one I bought with my spare engine some time ago. But never needed to use it.
Was checking through spares to refurb, as I am with the gearbox and another spare M20 Engine.