To do the modem upgrade, I used the modem from a 2017 Ford Escape. It was the same part number as the modem supplied in the upgrade kit.
I just did a search on ebay for one, and stumbled upon this, similar to the modem I bought. This not a voice control module.
https://www.ebay.com/itm/314196679294
Heres another
https://www.ebay.com/itm/234663158099
And another
https://www.ebay.com/itm/234726232193
Make an offer to get it cheaper.