CAT 339-3067 is a warning indicator panel. For a buyer looking for this number, the distinction from an engine control module matters: a warning panel presents information to the operator. It should not be ordered as an ECM.

Start with the symbols and indicator positions on the existing panel. Then compare the rear connection and mounting points. A similar front face is useful for narrowing the enquiry, but it does not establish that another panel will fit.
Send a readable label photo together with the machine model and serial number. If the old panel is missing, say so; a photograph of a neighbouring unit should not stand in for the original. Include the quantity required when requesting availability. Other display panels can be reviewed separately if the number cannot be confirmed.