Wonder how much it would cost to get an engineering machine shop to make a reverse stamp from steel for these?
Some CAD/CAM software programs allow you to make a raised shape out of a jpg image.
If you could make the model it wouldn't take long to machine.
Yo would then be able to get the Hot Stamp look on the caps.

Yes boots. I do have the knowledge to do it it would only take... 20 mins from the original sticker I have done from photoshop.
but how could i press it in to the popbumper cap and paint it?
And where/how would I get the stamp/mould-thing made??
I'm sure I can find the correct CAD program