Looking for Aston Martin DB5 door frames and other parts

[SinisterSF]

I'm building a Aston Martin DB5 streetable race car and I need a few parts to make the car a little more streetable. I want roll up windows so that will require door frames, wondering if anyone has some decent used ones. Also looking for trim pieces and side/rear glass if anyone's got some on this side of the pond (USA). I know a few parts dealers that can get all this stuff new, but I'd like to find some used stuff to save some scratch since it's a race car, not a big ticket show car worth a fortune.