Hidden hitch, rear roll pan

[aitch]

I'm looking for some input on how best to install a hidden hitch and find an appropriate roll pan that will work with this set-up.
I have looked at the Sir Michaels and think that the tag box sits too low. I like the look of the Mar-K roll pan but don't know what is involved with notching the rear seal to accomodate the tag box.
I would appreciate some ideas from all you guys who have been there done that.