Here are the images needed for the RocketClock docklet to match my Buttons found here: http://rocketdock.com/addon/icons/35833
If RocketDock is already running with RocketClock installed, you'll have to quit RocketDock before doing any of this.
After installing RocketClock, extract the files to the Images folder found in the RocketClock folder. If you don't want to overwrite the default images, either rename the old files or put them in a separate folder.
Restart RocketDock and you're done.