Just a little word of warning on this. The official factory notice states that the short exhaust is for N1 GOODS VEHICLES. In the factory they still fit a long exhaust IF the vehicle has passengers in it, e.g. windowed van, california, caravelle etc. If you're doing any conversion work and therefore have passengers above and behind the exhaust discharge, e.g. camper van, taxi, wheelchair accessible, minibus etc the current stock answer is you shouldn't start with a van but should've ordered a window van!
I'm in discussions right now with VWUK to clarify what should happen with the conversion market. Even though they still make the long exhaust for their factory built window vans, california and caravelle they're currently stating that the long exhaust should not be fitted to anything that starts life as a panel van. Squaring this circle will be an issue going forward for conversions on VW's I think.