Na, not that many!! But I do try to collect them when I see minor variations. I'd wager that the chance of ever coming across an original is very slim. That said, many of these "new" ones would definitely have been issued to veterans as there is evidence to this. Sure, some were made for the collector's market or to be purchased by whomever - buy you definitely see these with markings that indicate regiments and so on, both the Great East Asia War medal as well as the Commemorative versions. You'll find these with dated paperwork too, best I can tell, the majority of these are from the 70s and 80s. Don't know if you can still buy these as "new" or not. But some of them are in FINE condition, no doubt!
A nice, complete piece might include the cardboard box with a paper wrapper depicting the medal (rare), the medal and case of course, and possible the cellophane (?) wrapper for the case and some sort of explanatory document. They're out there! Brian, wait until one of these comes along as "complete" as possible - you'll be happy - these are really nice quality pieces - yeah, the cases are typically plastic, but there are the wood and lacquer versions too (the lacquer ones are REALLY nice - solid silver), but the other copies are too. And keep your eyes open for the Imperial Guard variant! Totally different center on the obverse and different inscription on reverse and case. There really is a significant amount of variation in these (post-war) medals, really fun to collect!