I know a couple people growing it but none fruiting. and your right , I would not reveal that info.
What I was trying tip toe around is: What are you gonna do with Wani in SLO but kill it and kiss your $ good bye ? I overstand that people do that day in and day out, it's their right, but rare seeds and seedlings that come around never should go to safe places first I believe. It's theoretical anyhow though, never seen a seedling for sale here or anywhere. If a seedling did somehow come up for sale , it needs to go to somewhere where it can live and maybe fruit. Not sold to the highest or first bidder.
I have had people trying to convince me to grow Mango's in central CA for a long time, since the "Mango Professor" cold hardy mango debacle that I poo poo'd all along the way and turned out to be a total fraud ( he was sued by some CRFG chapters). Steve in los osos had a manila fruiting in a high tunnel but ya know, not really.
North of Pt. conception along the coast is not warm enough, go inland and it's too cold. SF East Bay and some Delta area's are marginal because the large bodies of water and asphalt mitigate the cold and they are inland enough the fog doesn't swamp their growing season. I love Mango's.