These are the handles with engine numbers for the Boeing 737 throttle (the slightly modified version), that can be downloaded from the FlyAway Solutions website:
I am also including the auto-throttle disconnect buttons for the handles. Normally the handles should be printed in white, the buttons should be printed in black. The buttons are non-functional - decor only.
In addition I am providing the models of the engine numbers that should be installed into the handles.
The ATDIS button should be pushed inside the handle with force. It will stay there even without glue. In some cases a minor adjustment of the holes or button's bottom may be needed to ensure that they can be pushed in.
The numbers should be printed in black color, with brim, carefully cleaned from extra plastic and inserted into the number "gaps" of the handles. You can use a flat screwdriver to insert the printed numbers, but be careful. They should fit tightly, so no glue is needed. Depending on your printer's resolution the gaps may need to be a bit adjusted to be able to insert the numbers.