I've checked with O'Reilly's and DupliColor... they just don't make it. They do make B4 in those little pen applicator/scratch fixers, but not in an aerosol can. I found a place online that will mix a can for $20 plus shipping but I'm trying to get the bare metal covered before it rains again. There is a Sherwin Williams store that will mix automotive paint (acrylic enamel) into aerosol cans... I'm going to talk to them in the morning. If they can't do it for a reasonable price, I'm just going to order them online and pray for no rain.
It's only for the window frame and that will mostly be covered by the new weatherstripping, but I'd rather not have to primer over it and try to paint around the primer and new rubber later.