axiom 9 and cameras..

Good day. I just purchased an Axiom 9 with the 3d transducer.

I have 6 cameras ( analog/BNC out) that I need to convert from BNC to the cable end ( NMEA2000/Seatalk) for the hs5. I see the adapter in a pic with the raymarine 50 and 100 cameras. where can I find these?

thanks in advance.