Looking for simple WP image swap plugin

I need a Wordpress plugin that swaps one image for another on hover/mouseover.

A fade transition between the two images would be ideal.

Responsive design is a must.

(All I can find are plugins that create text or color transitions.)

Have a theme for WordPress - if you’re interested in:

Thanks, but I need a plugin, not a theme.

I can create one if you’re willing to pay the amount

Did you ever find a solution to this? I’m looking for the exact same thing and have been through hundreds of text hover plugins but can’t find one to simply change the image to another image.