http://www.itptires.com/newproducts.html
Sorry that's the best link I can get you, but that's how I found them. I did a dealer locator search and ordered them from there. I'm not sure what the offset is, but they're .190, 10x7, 4x144 polished wheels ... like $91 each.
For the front tires, I'm either going for the 23" Maxxis Razr 2's or 22" Pure Sport Bandits.
I like these swampers a lot so far, no drawbacks yet. Other than that they're sure to tear up anyone's yard! As you can see, I'm still waiting for some real snow!