I replaced the Intel WIFI/BT M.2 card on my MSI Z370I Pro Gaming Carbon AC mobo with a Broadcom M.2 card purchased on eBay for $28.
To make BT work, I needed to add BrcmFirmwareRepo.kext and BrcmPatchRAM2.kext
To activate WIFI, I added the following to config.plist:
<dict>
<key>Comment</key>
<string>AirPortBrcm4360 - fcvo</string>
<key>Disabled</key>
<false/>
<key>Find</key>
<data>gflSqgAAdSk=</data>
<key>Name</key>
<string>AirPortBrcm4360</string>
<key>Replace</key>
<data>gflSqgAAZpA=</data>
</dict>