Hey guys I just thought I would share this.
I just bought two quater glass windows from a 2009 scion Xd
They are pretty darn close and curvature is right there to. For me I would rather make these fit then go with lexan. I paid 30 bucks for each shipped on ebay.
They came with window gaskets to. Not sure if I will use the gaskets or not yet. My body is an oem copy but I would think they could be made to fit the g28 as well.
Hope this helps.
Mike