Even a parts list would be great. The hardest part is going to be finding the motherboard tray.
M/B tray could be made easily from plexi, wood, fiberboard, even aluminum sheet. If the OP doesn't pursue this I will be forced to. I'd make a prototype and price it out to a machine shop for the cutting.
EDIT: In looking at the source listed and figuring the parts I get a material cost of ~$46, but shipping/handling($10!) to my zip is another $32! Total of approx $78.