I think Ed is referring to the helmet being an Ago, not the bike. At least I hope he is, as you correctly point out, the bike is clearly not an Ago.
AGV did make an Agostini tribute helmet and that one looks to be it.
You may recall that Arai did a few Agostini replicas too.
Hi Guys, you are correct in assuming it's not an AGO, it's just the decal. The helmet is the AGV tribute. I have taken this off the road now to display and am now debating whether to try and find an ORO or an RC 30 but as you all know we are in 30 grand plus territory here in the UK. What sort of money are these making in other parts of the world?