http://www.coinsupplyexpress.com/RC32-Supersafe-sku-4192.aspx Expensive, but good to use on some higher grade pieces.
thats odd they fit almost perfect in mine wih a very small bulge on one rim just a little snug thats all
or you can get these made in england for gb coins http://www.predecimal.com/coin-framesmylarsflips-lindner-reduced-p-45.html