Last week I stopped at Advance to pick up a bulb for the 3rd brake light on the 87. There was no application chart so I went to the counter. They indicated it was a 9** something bulb that looked something like a side marker or instrument panel bulb on steroids. Today I got around to replacing it and found the correct bulb to be an 889 halogen. Returned to Advance to be told that those bulbs have been discontinued and are no longer available and there's no alternate bulb.
Got my money back for the incorrect bulb, went to O'Reilly's and got one of the half dozen or so 889's on the rack. Thought about buying up all their stock to raise money for my retirement fund since they're 'no longer available'.