If you Bought a Brompton, they have a number of bags
the C bag is sewn, and looks nice off the bike as a shoulder bag.
this year they got a bag from Ortlieb Made for them, and a leather briefcase , that use the head tube mounted clip..
Nashbar has a backpack/ pannier, zip covers the hooks .. lots cheaper, [sewn in China of course]
one color red/black/gray