ive got a 03 Bora (jetta 4 to yous in the us) and it has the double din. although some models have a storage tray in one of the spaces.
if youve got this storage space why not rip it out and put in a motorised one.
i did look at that option but would prices over here are double what they are for free standing ones (can fab it in place) so im doing the same as most others relocating the HU (dunno if its going in the glovebox or under the drivers seat) and my current guage setup down to where the ashtray is but will have to leave room for access to the diag. port.
other option if you dont have the storage tray and have the cd changer in its place you could move the changer to the glovebox and fit a motorised lcd in its place.