Just a little update: PST responded and told my friend the parts were NOS and because of that, they were shot...
He was told the parts were the last they had and now they have to order new ones... What may take a while.
Besides of all the trouble we had with complaints, multiple international shipping, customs and so on, I think PST should have never sold them, nor ship them without inspection. Especially NOS parts that were on the shelves for a long time. And in our case, especially as an internations customer, where an exchange is much more difficult and time consuming.
I'm really not happy with that customer treatment.