If you need any fixture PDF files, they're here: http://www.nightscaping.com/our-products/
The line drawing have things like screw sizes if you need any replacements. Hardest to find will probably be the threaded aluminum "nails" for Illuminators and Footliters. The brass ones for the copper versions of those two fixtures don't seem to fail as often as the aluminum ones do.
Attsahced are a couple of samples of their PDFs, the aforementioned Sagitta and Soffitliter.