Nothing more vintage-inspired than detachable collar shirts. There is not much choice in ready-to-wear, and these are the only I know of:
http://www.newandlingwood.com/iashop.php?function=listprodcat&Category=9
http://www.pakeman.co.uk/proddetail.asp?prod=2930
http://www.pakeman.co.uk/proddetail.asp?prod=0464
Anybody know of other makers?
http://www.newandlingwood.com/iashop.php?function=listprodcat&Category=9
http://www.pakeman.co.uk/proddetail.asp?prod=2930
http://www.pakeman.co.uk/proddetail.asp?prod=0464
Anybody know of other makers?