Top TV Mounts is somewhat new to the online mount vendor scene, but has received a lot of good reviews from sites like Google Shopping and Retailer Ratings.

Their mount finder system is basic, only making recommendations based on brand and screen size, but not the specific model.

Their saving grace, however, is a capable filtering system. Once you’ve narrowed your selection to brand and screen size, you can then filter by VESA mount size, weight, and stud spacing. The main downside is that you need to know these characteristics, or measure them.

http://www.toptvmounts.com