Welp, I was able to pull up the 190K Biz Plat and 150K Biz Gold offers but got the popup for currently having or having had the card in the past. I closed my Biz Gold in 2019 and currently have a Biz Plat, so it's not a surprise but still...
So I applied for P2 on the 190K Biz Plat since he's never had one...and was denied. Something about considering his history with Amex (20+ years), transfer balances (have never done this), opening/closing accounts (ok, guilty), blah blah blah. I did accidently forget to pay off a Lowe's card on the due date last month but made the payment the next day and was able to get the late fee reversed, so maybe that was a ding. Oh well, I can tell myself that I tried.