I am afraid we don't have such a skin in the ASP.NET AJAX suite and have not considered creating one, due to its limited applicability. Generally, such an appearance would require a lot of HTML elements to hold background images and our controls have been optimized to contain as few elements as possible. Well, some controls could support such a skin, e.g. RadToolBar. The other controls could support such a skin with limitations, i.e. the controls should have a specific width and height, so that fewer background images are used.
All the best,
the Telerik team