It's actually pretty easy to do.
This place has the clamps, and even micro-tuners if needed (for multi color jobs):
http://www.knight-mfg.com/accessory_itemsThis place has really affordable screens, and squeeges (great service, and super quality):
http://www.rhinotoughgraphics.com/index.htmI got my ink and emulsion from this place (maybe not the cheapest, but an easy one stop shop):
http://www.silkscreeningsupplies.com/This ink is pretty pricy, but super durable. I bet you guys could buy a can, and split it up pretty easily.
http://www.dickblick.com/products/naz-d ... ss-enamel/Just get a thick piece of glass, and powerful 500w halogen ($14 at Harbor Freight), some plywood to build your platen (I'd do a couple for the different size enclosures).
The process isn't too complicated, especially if you guys are savvy enough to learn something like soldering and circuits. Look up youtees on youtube. He's selling his equipment (which is geared towards shirts), but he's SUPER thorough (and super boring, lol). So you can get a good understanding of what he's working with.