Ha, I'm in exactly the same position. I'm looking for a DAB aerial solution for my Alpine TUA-T100DAB, which of course is to work with the very excellent Intravee (why use anything else:-)

Like you, I don't want any external mount and the best I've come up with is the Bosch/Blaupunkt Autofun internal glass mount kit. I'm thinking of mounting it on one of the rear side windows. I reckon this would be the best 'internal' solution.

The other idea that intrigues me is to use an external one but mounted somewhere hidden - in the rear bumper for example. But that would require it to be horizontal and I believe DAB is vertically polarised and so a vertical aerial would work best.

Of course, if you already found a solution, please let me know what you did. Anyone else have any suggestions, please pitch in.