You can acquire the Qualcomm Atheros AR9462 (QCNFA222) Wi-Fi/Bluetooth modem very cheaply from eBay or other online marketplaces, usually costing around $15 USD or so. If you want a guide for removing URL parameters on eBay for guest checkout, among other websites, I have written one for the Purism community forums:
The boot firmware is the latest version and was not downgraded:
You should be seeing a boot splash screen displaying “Librem 15” in very big white font as the board name.