Show default image if requested one has not been found on server - htaccess level

Hi,

I have a image hosting website, I do obviously allow hotlinking, my problem is that sometimes I need to remove some images for copyright infringement, etc. and this image has been already embed on some other websites, forums, etc. In this case instead of request image X square currently shows up. I need some htaccess level solution to show some default image in case if the requested one does not exist anymore.

Thanks for help