Series 2 2 litre diesel air hose

I'm looking for a new hose to run between the inlet manifold and (original oil bath type) air cleaner. Both ends are 2" OD overall length would be about 19". I bought what I thought would fit (described as suitable for Series 2 diesel) but it's much bigger diameter and about 24" long. I'm guessing it's for the 2.25 engine.
My question is - does anyone know where I might be able to buy one, or if the petrol engine air inlet hose would fit? - ie does that have an internal diameter of 2"?
I could bodge a bit of any old hose on there of course, but I'd like to keep it as original as poss within financial reason!

Don't know where you are but if anywhere near York there's a bloke at Rufforth Auto Jumble sells all this sort of stuff. Sorry don't have a name or number for him. Try flea bay.

Looks a lot narrower than the one I have fitted