BNC panel to expose 48 DIO from PCI-6229 NI board

[Synss]

Hello everybody,

I have NI M Series PCI-6229 boards. I am looking for a way to expose all of the 48 digital I/O (DIO) from the card, or at the very least, the 32 lines on port0. I would appreciate if it is rack-mountable (19") as well. And I am working in a German university so, although I would appreciate any recommendation, it would be easier for me to buy things in Germany (or maybe Europe).

So far, on NI's site, I found things like the NI BNC-2090A, but these are only exposing the analog I/O, and the PF IO. So they do not work for me. I also searched the forum here without success.

Thank you.