Any classB transceiver should work, if it's nmea2000/Raymarine ng, then there are plenty out there to choose from. Raymarine AIS650, Digital Yacht AIT2000, McMurdo etc. I have a Raymarine ais 650 on one boat & a Digital Yacht on the other. Both work fine & have nmea0183 & N2k. You might get a tad more integration by sticking to Raymarine, i.e. initiating dsc calls from the e120 (but who uses dsc anyway??) The digital yacht will be around 30% cheaper than the ais 650 & it's a fine bit of kit.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5