You can google and find pretty hi-resolution versions after you google "Batman logo" and look in the images tab. There are tons over 2000 pixels wide. But if you are looking for a hi-res vector image you might need to hire someone to do that for you.
Cool suggestion, tried it, it doesn't feature a screen accurate logo from the movies. Just the common one.
Obviously google is the first directive. I did find one before posting this thread but was hoping to get some superior/more accurate graphics. If anyone has the 89 chest emblem or Batman Returns logo in high resolution, would love to be able to download.