I imagine you have already answered your question since you asked this question some time ago. However, if you are still in need of a router table...
I recently purchased a Dremel 4000 and was about to get the router table when I decided to make my own. If you still don't have a router table and are interested in a project that you can make for your Dremel, and make it using your Dremel, here is a link to the instructable I posted:
There is a complete set of instructions with a material list and even some easy to use templates.
This project is for a combo - table saw / router / shaper. If you really don't want to make this table that I designed and are only looking for a router table, here is a link to the original design where I got my idea (just a router / shaper table):