They're not in the Tamiya 1/48th kit either Dan. I'm presuming they must be part of the Eagle Cals sheet. If you want to make some, try to get some self-adhesive aluminium foil, failing that, ordinary kitchen foil, which can be glued down later.
Paint it matt black (enamel). When totally dry, scratch in lines of dots, or thicker straight lines to represent rectangles where data might be stamped. Cut out and stick where required. Works OK in those places where they can just be seen but not that clearly. For example, low-down on cockpit walls, on the breach cover of the motor cannon on '109's, and on gear legs.