A couple years ago I was considering stamping reproduction aprons (because they are usually damaged too) and had even enquired about printing them using licensed artwork and it was met with enthusiasm from everyone involved in the venture including the Bally license holders. I even have the apron fully drawn and modeled in Pro-E Creo ready for manufacture.
But there were some on here who claimed they were already doing the same thing so I cancelled the project. I don't really want to compete in the niche' market of manufacturing reproduction pinball parts. That's why up to this point I have only manufactured stuff no one else is doing. Even then you have to be a pinball enthusiast to even waste your time making the stuff because the returns are not very lucrative financially.
There's a thread on here somewhere by the guy who said he was doing the aprons. I hadn't thought about it in a while but I haven't seen the aprons yet so he may have just been talking.