Just create your own. I have never used the Spruceup templates and always created my own. Photoshop does this with ease. If you don't like the buttons that are provided, use PS to modify them to your hearts content (I don't like their colors so I just changed them). You can drag any picture (in the correct size - 720x480 for me - into the window where Spruceup's offering lie.
At the bottom of the Doom9 Authoring Guides section, theres a page on using Photoshop to create your menus and backgrounds that you can check out. I had never thought about using Photoshop to do that, but it works great.