Forgive me, I don’t have an Ig. M. where I am at the moment and it’s been many years since I last read the Teshuvos, but I don’t remember Reb Moshe saying that it was only bshas hadchak. I further remember seeing cholov stam in Reb Moshe’s fridge. I also remember that the second Teshuvah was basically, “Yes, I did say it and I meant it.” So, if it were an issue why did R’ Moshe permit the Rebbitzen to drink stam and why did he bother to include a Teshuvah the emphasise his heter?
While I don’t understand how anyone would buy cholov stam in Brooklyn (or Monsey, Lakewood, or any Yiddishe Stadt), I certainly understand that many in out-of-town locations people are hard-pressed to find milk and dairy products that are chalav Yisrael and not spoiled. Let them know that there is nothing wrong with drinking “company milk” as per Reb Moshe’s Heter.