Certainly up until recently, the Penguin decals were available for the Antarctica - I bought a pair for a colour-coded trailer we are built for our Antarctica.
I would not worry about them peeling or becoming damaged - our 63-plate TwinAir Antarctica still has pristine decals in tact with nothing more than a little care when washing those areas. They are marmitey - some people will physically recoil, but others absolutely love them. I once had an owner of a white BMW X5 pull up alongside and ask where to get them! Not sure they’d suit the otherwise somber image of an X5!
Good points about diesels, @hertshillhopper, though being a 2013(-14?) model only, any Antarctica will likely be affected by the ULEZ changes? Not sure.
The TwinAir engine divides opinion - some claim it noisey and unrefined, others enjoy a more characterful engine. I fall into the latter camp - in fact once spinning at a cruise of 2-3000rpm, the engine is very smooth, quiet and refined, especially in ECO. It’s when you ask full throttle, ECO-off that the motor becomes more vocal. I quite like it - it reminds me of an old A-series Mini, crosses with a 2CV in both noise and delivery (lots of mid-range, no gains felt from revving too high).
Anyway - good luck in your search. You can see a photo of our TwinAir Antarctica here: