There are a bunch of Clarendons -- it's as much a style/classification as it is the name of a specific font. In addition to the many typefaces with Clarendon in their name, you might consider these, which follow the same model with varying degrees of fidelity:

Sentinel
http://www.typography.com/fonts/font_styles.php?productLineID=100034

Sutro
http://new.myfonts.com/fonts/parkinson/sutro/

Oxtail
http://new.myfonts.com/fonts/macrhino/oxtail/

See this discussion: http://typophile.com/node/51335

thanks guys :)