Hi Boris,
Yes volvo fl6 getting pretty rare now I was looking to swap for a newer scania but not sure yet. The trailer was a yatch trailer before been built from the ground up to what it is today.
I remember driving FL6's when they were fairly new, reasonably civilised but a bit gutless?? I would be itching to put something a bit pokier on the front but you re going to struggle a bit with seating. Something like a T142 would be my choice preferably with the 10 speed.