G Line Bag

I got to visit the Brompton Junction store in NYC today and see them for the first time, and took a test ride. Being a bigger guy, I'm curious about the G Line. Does anyone have any idea if there will be anything like the soft padded bag for the G Line? I will travel (airline) with my bike weekly, and would like a travel solution i can fold down and attach to my backpack while on the road. I have a method to do so figured out with the C Line, but just wondered if anyone had any idea for the G Line.

Otherwise, I'll probably just pick up a purple 12 speed C Line.