You can get one size fits all brackets dirt cheap, just make sure it's rated high enough to support the size and weight of your exact telly. Plasma's and LCD's have fittings on the back that support these one size fits all brackets as we used a couple at work, for a Hitachi plasma, and a Philips one too.

I have a feeling the name for the brackets is a VESA bracket....thats the name of the fixings that are the standard for nearly all tellys