Which fabs can do plated slots?

[NeverDie]

I'm thinking of adding various plated slots to some of my PCB's, but I was surprised to find that OSH PARK doesn't appear to do them. For instance, I uploaded this simple micro usb test board:

and the automated OSH PARK acceptance engine balked at doing it. So far, it appears that PCBway will do it though.

[Fabien]

see here : https://www.eevblog.com/forum/eda/oshpark-plated-slots/