I have one for my V that is tailored to fit it. Bought it online but I can't remember the name (away from home with work at present). Carcovers.net or something. Can't remember. Will try to remember to have a look when I'm home but PM me if I'm not back to you with in the week. I'd definitely recommend it.
these were the ones that were recommended to me but for the full outdoor one its 370quid for a 6 so a pop up garage would be as much...couldnt decide, too many horror stories about mould and damage to paintwork from covers i decided not to bother.