From Asia. Yeah it is risky - but no pain no gain.
I realized that it cost so far less when i ordered my bifold doors 2.5m X 6m for 3.5K compared to paying 10-12K.
This is really interesting as it is the first time i read this thread. I am actually attempting to do a kit home too. but mine will be from overseas.
Wow - must say you have lots of determination!