Widebodies

How popular are widebody private jets?

Boeing boasts about having sold a number of 747-800 and 787 business jets. Airbus recently opened a section on their website about widebody private jets.

And see Gulfstream:

Industry sources say the company is working on a widebody with a 13,300km (7,200nm) range, compared with the G550’s 12,500km at Mach 0.8.

from
http://www.flightglobal.com/Articles/2006/10/24/Navigation/177/210156/Gulfstream+rumoured+to+be+set+to+add+’Fat+5’+larger%2c+longer-range+G550+variant+to.html

Sure – there are a lot of interior options which just do not fit into the 12 foot cabin width of 737 or 320.

What kind of cross-section could Gulfstream be looking into? And what are the other longhaul jet manufacturers up to (Bombardier, Dassault…)?