Thanks Steve. But I only need to get the fasteneres replaced, not the whole zippers. But I see, I've studied the B2 sleeve set up. Look complicated. Ok, I'll take the jacket to the guys I found and see what they can do. But is it usual for new (but NOS) zippers to break that way? I've barely touched them.4 oz is pretty thick for one of these! The main zip shouldn't be an issue to replace, but the sleeve zips could be very tricky, unless you have someone with lots of experience change them out. The B-2 has a pretty complicated setup on the sleeves.