I had gotten a handful in an eBay lot a long time ago and used to gave them out to friends and workers (with over 30 odd Cthulhu/Mythos shirts which I wear every day nobody was surprised at this and thought it was pretty cool) but after I was down to 2 or 3 regretted that a bit. Luckily about 2 years ago I was lucky enough to get a mint bag which I haven't even opened yet. So if you are willing to check eBay regularly they can still be found. Although I have seen individual pieces going for unreasonable prices also.