If you Google 'van chairs' all sorts of options come up. Custom vans have seats with arm rests, reclining backs and swivel or swing/swivel bases. Not sure if they fit your definition of captain's seats, but there are plenty to choose from, it's all in how much you want to pay.
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI