I have never seen changed Nestlé for supplier, even not with a 5 to 10% price discount. Their prio is NPD.
However their policy says that normally they should have dual source at least on paper for supply risk mitigation.
So the best you can offer is at least to qualify just in case they need.
From HQ I won’t have any support unless local wants this. Should I be in Thailand, we can have this on list of visits.
Let me know if this can happen.