Thanks for taking the time to dig that out Ian.
I have to say i'm a bit worried about how easy it would be to clean the rust up and then repaint it. The areas around the edges look to be really really tight and i'm not sure I could do a decent job without having it shot blasted.
The other option is I just accept the minor damage to mine and spray over the top with a suitable paint. No idea if it's possible to do that though or if it needs some sort of primer or not.