Just spent about 2 hours searching every avenue for ANY wing-fold kit for a Skyraider, without luck! You don't suppose you could adapt the wing-fold from the Airfix Buccaneer do you? Just a thought, 'cos I've got a part-built Buc, and haven't decided on fold or not fold. If you think it could form the basis, you're welcome to the parts, but I realise it's a long shot!
Looks like you might be down to using brass wire, plastic strip card. That's what I'm going to do on the old Hobbycraft Sea Fury, when I get round to starting on it again!
BTW, did you have any success with finding the Tamiya paints?