1996 S420

I am looking for the 2 light blue bulbs that go into the four air vent knobs in the center of the dash. The one's the dealer is giving me are two tall to work and are tan in color. The bulbs themselves are clear & 1.5 volt, however, the socket holders that are made on the bulbs are blue or tan. I need the super short tan ones. Does anyone have the correct part number, and have any of you had this same problem? Thanks for any help........

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