I believe its a common B&R strap. Perhaps its only on the Heritage line but I'm not sure about that. I have a friend with a 42mm (01 series) Golden Heritage and his watch came with the strap.
I have no info on local sources.
As for Internationally made straps, there are tons of makers for aftermarket B&R Straps. Wontan, Cheergiant and Strapfreak come to mind for makers in this part of the world.. (Taiwan and Indonesia). Please note Strapfreak sources many models from other makers around the world so their order times can be longer than the others. Or so I have been told.
Also check out Combat Straps for exotic skins and a huge selection of colors out of Canada.
Nice watch. Enjoy..