Depending upon what you want to use them for, you can find drybreak disconnects for relatively cheap on ebay. I've never seen a bobcat skid steer up close and personal, but apparently they use 1/2" or 3/4" flat face disconnects for their hydraulics. Here's a pair that I bought.
linky. $65 US seems to be the going rate.
I'm building a modular setup (pumps, chiller, rad, res in one easy to carry separate box), and these are going to make it easy to take to LAN parties. But they're pretty hefty, and I wouldn't really want to try to fit them inside one case as Joe did.