I found the link in a Yahoo NCE DCC group. Ordered six of the white and received them today. Some assembly required. Add your own screws.
http://www.mouseholder.com/
Rich
They look like they will work okay. Please let us know
They work very well. The specs are on the site.
You might have to cut out the two tabs on the bottom of the holder.
For $1.99, you cannot go wrong.
Rich