Sounds like a great choice of first car sir...! Let's see some snaps of it as soon as possible...
I had wing mounted mirrors on a Rover P6 I had many years ago and they weren't really that useful to be honest!
I would go for a standard square/rectangular mirror just on the drivers door (a mirror on the passenger door isn't really that useful) in a nice chrome finish to complement your splendid car.
You should find something suitable here (or on eBay of course!)...
http://www.moss-europe.co.uk/Shop/Searc ... hText=door mirror&WebCatalogID=0
With regards to the rust, get it looked at pronto as it doesn't get better by itself and the longer it gets left the more it'll cost you...!!!
Good luck with all things motor related, it sounds like you've got a wonderful car in your possesion...