Thanks to LokiWolf https://www.expeditionforum.com/members/lokiwolf.52626/
3.4 can be done on any Sync 3 system without doing the Firmware or having a new APIM using the Format Tool.
This is the process you should be following and files you should be downloading.
https://cyanlabs.net/tutorials/update-ford-sync-3-2-2-3-0-to-version-3-4-all-years-3-4-19200/
Just to be clear, there is a risk of bricking your APIM, and this is AT YOUR OWN RISK.
3.4 can be done on any Sync 3 system without doing the Firmware or having a new APIM using the Format Tool.
This is the process you should be following and files you should be downloading.
https://cyanlabs.net/tutorials/update-ford-sync-3-2-2-3-0-to-version-3-4-all-years-3-4-19200/
Just to be clear, there is a risk of bricking your APIM, and this is AT YOUR OWN RISK.