Check out this thread if you haven't already:
People show off using the Dashboard Link tile in some creative ways. Are you trying to recreate the native dashboard list but make it look like the dashboards you created? I guess I am not understanding because my suggestion will allow you to do that. You would also need to create a Dashboard Link tile on every dashboard that you have already created to go back to this new Master Dashboard List dashboard.
If you dashboard link tiles are 1x6 (or some other large number for width), then you can get the same short wide tile look of the native dashboard list.
Something like this:
Since you know how to use CSS, you could get rid of the "Dashboards" across the bottom of every tile. I haven't gone down the CSS rabbit hole yet.
