Every TV mount comes with too many screws. I've managed to collect* a few hundred miscellaneous such hardware, and if you can figure out the thread size I probably have some I could send you.
Then again, I know of two hardware stores in the Los Angeles area that have great collections of metric hardware. Your choice.
*When we did a large system in Saudi Arabia a few years ago, I shipped about forty pounds of various metric screws over there just to be sure we had 'em. All those screws were extras from a few years of mounting normal TVs.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
