The Small Box Hong Kong games are some of my favorite all time NES games. Something about the small boxes and almost pirate looking plastic makes them infinitely superior to their NSTC counterparts. I beleive these use the Famicom Box Art as well.
eBay seller baldrock has a bunch of for sale currently. I gotta tell you too, I respect the effort this guy (or girl) put into their pictures.
Available Zelda, Battle City, Start Solider, Kung Fu, Duck Hunt, Ken Shiro, Excitebike, Gum Shore, Lode Runner, Pinball. Soccer, Pooyan, Popeye and Star Force.
Cheap starting bids too.