@hns @EvilDragon
as mentioned before: my wfe works at a german PCB (only) producer, which is specialized in hight quality and mulitylayer. (My wife works at the department, which reviews the data for production).
So I could think of two steps to take advantage of that:
1. check, igf GC is aware of the company
2. if not, I could dig a bit in according to: production speed (and maybe some "special price" for supporting open hardware and my wife working for that company over 25 years).
(would need the gerber data for that, of course)
Should work for all PCBs, I guess (but CPU and MAinboard beeing the interessting ones)