The Vita fits pretty well into the Lanikai concert case. There is plenty of room above the headstock. I'd love to have a custom-made case for the Vita, though.
As for the Bell, Oscar Schmidt makes a vintage Bell reproduction with a custom-made case that is included with the uke at the time of purchase ($299). I'd love to find out with the Indonesian company that is making those cases has any for sale aside from the OS deal.