Most of these parts are available locally; the primary exceptions will likely be the vacuum collection tube, the mylar, and the Peltier junctions.

For the Trough mylar scrap lumber rigid backing material (to hold the shape of the trough and to affix the mylar to) assorted screws, bolts, and other connective hardware

For the Manifold (these are all copper plumbing parts) reducing T (3/4" x 3/4" x 1/2") 3/4" copper pipe, about 4' (possibly replace this with a crinkly tube) 3/4" cap 1/2" copper pipe, a few inches shorter than the 3/4" pipe appropriate fittings to get the two ports connected to the tubing

Vacuum collection tube (4' long, 2" in diameter)

A detailed explanation of the trough design