In the last few days, the Insteon Store has turned on the sales and ordering pages for the 2413-series PLM. The page shows an ETA of Q1-2023 and they have a "Notify Me" option for an email alert when the products arrive in stock.
Seems this is new production and some improvements have been made as the copy states:
Latest version includes updated hardware components for longer lasting performance
Serial: https://shop.insteon.com/products/plm-s ... -interface
USB: https://shop.insteon.com/products/plm-u ... -interface