Obsolete EMI Filter replacement?

Hello there,

I’m designing now an open source Carrier board which has the goals of beeing cheaper and integrate the buzzer into it as well as having the old px2 ports for the users who want to remain with some of the px2 hardware instead of buying the expensive PCNC compatiable producs.

Now in the PCNC schematics you can see an EMI filter conected to each connector on the board but when you go look for the manufacturer number of it noone supplies it anymore…
Anyreason why is that?

Thanks for helping!

be careful with a buzzer close to IMU and other signal wires
This can generate lot of noise and impacting to digital signals, this is a reason why buzzer is on the long wires in other designs