On the verge of extinction nearly 10 years ago, the standalone navcomm radio barely soldiers on today. While there are few choices for new ones (there’s a much larger market for standalone comm radios), a navcomm installation could make sense for basic panels and for advanced ones to back up a GPS.
Hang on to your wallet. If the panel hasn’t seen a radio upgrade in a while, you could shell out more money than you anticipated to upgrade the antenna system and gut out old wiring.