Go to www.harveyind.com and look at the Classic line, (That's what I put in my house,)or go to
http://www.abcsupply.com/ and look at the Certainteed window line.
They are both located in CT. and are wholesale supply companies. If your friend does windows, he will be able to buy them there.
You will get alot more window for your money and a great warranty!
I have a very odd feeling about the 12 week waiting period. Did you give your friend a deposit to order the windows?
I hope I'm wrong but, is there a chance that your friend has used you as a bank with the hope that he would have enough money to order the windows within a few weeks of when you gave him the money and things fell apart?
I would ask your friend to show me the confermation, or reciept, of the order to see when the windows were ordered.