I absolutely love these images by Mark Weaver. You can see all of them on Mark's flickr page. While he does have a big cartel store, it doesn't look like he currently has much for sale. I might just have to contact him and see if I can convince him to run off a couple prints for me.
Also of note, he was recently commissioned by The Impossible Project to create a limited edition set of prints based on the inventor of Polaroid instant film. His print of Edwin Land is shown above. They are available to purchase.