Man thats some nice work there on that playfield  

I do remember these rub on transfers from years ago.. i used to use them on the control panels of guitar amplifiers i built many years ago.. different brand names to the ones in your pics but were the same type of thing.

And when i got into restoring pinball playfields a few years back i searched for them but had no luck. Although i DID use some of these on my home made pinball when i built it about 15 years ago, but since then have been unable to find them again.