Emailed a scan of both sides my Southwest Rapid Rewards card, Southwest Companion Pass and a screen image of my Rapid Rewards account showing the A-List status on 10/10. Received match to Alaska MVP on 10/30.
FYI, I had earned the Southwest A-List status via a status match from Southwest itself to JetBlue Mosaic status. I also earned the JetBlue Mosaic status via a JetBlue status match to my Southwest Companion pass. So, Southwest helped me get their own A-List and MVP from Alaska.
Alaska said it requires A-List Preferred to get MVP Gold 75K, and that MVP was all I was entitled to. It seems others were able to get a MVP Gold 75K status match with less. At least I had requested the Alaska status match after 10/1/2017, so this match is good through 12/31/2018.