Most of them are pretty easy to find like the one of Candice Michelle ( wwe diva on raw ) [photo here]
Some are a little plus hard to find like the one with Amara Ann Dunae ( the girl in the school girl outfit; par the way this is my favori Playboy Magazine Cover and it's the reason why I started link it is on March 1996 ) [photo on the bottom of this article]
Here is the cover I like: