Here is why we comb through eBay: Some well meaning person has listed a regulation doublet and mistakenly called it a PC. Unfortunately, the lovely garment wouldn't fit around many people's knees, much less their chests, but anyway, here is a listing for a 34 inch Regulation Doublet of barely postwar vintage:

http://cgi.ebay.com/VINTAGE-Prince-C...item4150d04e65