Warning lights, etc.....

[One Eyed Ross]

So, I am starting my building things project simply, the A-4's ECM panel.  This panel has several lights - rectangles, with lights underneath, you know, typical air craft type stuff.  What does everyone use for these?  I can put some LEDs in there and cover it with a piece of clear PET/Plexi and label it...but wondering if there was a source for rectangular 10-12mm LEDs that my google fu can't find.