I've fitted a DNX521DAB to my Octavia and plan on fitting a DAB aerial. In the past I've just used the ones that stick to the top of your windscreen.

I was wondering if Skoda ever fitted a DAB beesting that I could retro fit to my car?

http://www.dabonwheels.co.uk/Calearo_DAB-FM-AM_car_aerial.html

 

That's what I fitted, it exactly matches the original FM aerial in external appearance (I believe Calearo make the OEM beesting). You'll need a couple of adaptors; I can probably give more in depth advice about the install if you need it.

Some other options here

http://www.briskoda.net/forums/topic/339985-dab-ariels/#entry4103879