"Blackwatch, Grodon, MacKenzie, and Cameron are all available in fat boy sizes as well for around $300. It's about the same as noted above, only the sizes are availble."

These things are hard to beat. I got one in a 50" waist... yeah, I am one of those larger guys...what of it?!? Ha ha...
These things are tough, hard wearing, and warm. The only downfall is the buckles and straps. I want to get mine replaced, as I trashed the lower buckle on the left side. For what it is+a minor fee for new hardware, I would say that they are still hard to beat for what they are.
I got a Gordon from WPG when they were on sale=the deal was even sweeter. Also, the khaki hose from WPG is pretty good too.
It would be neat if the site listed above had regimental pieces in "fat boy" sizes, but you can't win them all, can you?