Glazing import request Ukraine

We are engaged in the construction of cottage villages throughout Ukraine.
We are looking for a reliable supplier of glazing supplier. Due to the current situation in Ukraine, we had to stop cooperation with neighboring countries.
There is a certain amount that we are ready to buy. But you need to understand the terms of cooperation.
Therefore, some questions are of interest:
1) What is the minimum order quantity?
2) What kind of discount can you provide?