What is (or how to get) latest Firmware for Surf AP 200 SPW209

We have been supplying this Pepwave to customers and would like to obtain the latest version of firmware. Currently we run 7.0.52
The FW for the Surfs is no longer on the download section.

Somewhere else I saw a suggestion to use the FW for the SOTG but I don’t believe the Surf On The Go is at all similar, much less would run the same firmware.

Thank You

The Surf AP 200 has been EoL for many years now and it is no longer supported.