Is there a plugin to predefine default background for the user to choose from?

Hi

Is there any theme or plugin that extends the custom background functionality of wordpress, to allow presenting some default choices for backgrounds, just like the custom header does? In the custom header, you can define an array of default images to choose from, but there is no such thing for the backgrounds, which would be useful for multisite.

Is there anything like that available in your themes or plugins?

Thank you

Mário