Serial Number Imprinter for Plastic Components

Try Domino.

They do this stuff all around the world.

Given your material, try any local fibre laser company. Lasers can allow you to have a better result on a variety of surfaces and less damage to your parts. Most good laser companies will offer to test mark your materials for proof of concept.

Good luck!

I use to sell laser marking equipment for just this purpose. Laser is the way to go for marking plastics and metals with the least amount of damaged to the material. Depending on the type of mark(carbon migration), you may not even see or notice any visible distortion to the material. You also have the advantage of been able to change the content on the fly if you want to mark part X or Part Y. In addition to Domino, you may also want to take a look at http://www.mecco.com/.

Just a thought. If it is an infrequent job and only short runs, you will risk having the wrong part marked up. Why not mark the parts at the injection moulding stage?