Hi Allyson
You are correct, Bailey do not fit Air con units, Its a dealer fit. HOWEVER, the dealer has to be an approved Bailey service centre as they need to obtain the caravan drawings and need to gain approval from Bailey to fit a unit to keep the warranty.
As the van is a big twin axle we are having the Dometic / Electrolux Blizzard 2100 fitted. The dealer can size the air con unit but to check the size go to the swift group web site, select a van of the same size as yours and click on price options. The size of AC will be in the list.
It is interesting to note that Bailey do not supply Air con but they do provide the ducting in the roof of their vans that is big enough for the cables required, and on our van there is a 400x400 mm frame hidden in the roof for a unit which means we keep the existing fan as well. Something that other manufacturers seem to not do.
Because we are ordering from a big dealer we have been very lucky. They stock a few Bailey vans and they have a Carolina in that was intended as a show van but is going straight to us. No waiting list.....
Steve