I'm not a big fan of either the Gardmaster or the Uni-safe. Brent Krueger also sells the pages that Gardmaster uses BTW. My complaint which I think has been voiced is that there are 2 layers of vinyl that the coin is encased in. So you don't get a good lock at it, but if you want to be nitpicky none of the albums are completely clear and allow you to see the coins as clearly as if it were not in a vinyl or acetate windowed albums. That being said its all about the protection that the album offers so having them in something is an advantage.
If you want a generic album I think both Whitman classic and Dansco offer blank page albums you can get. The large cent is 25.4 mm in diameter according to the info on this site.