I'm not going to lie to you, they are an awesome tool!!!
I got mine from NQ Fasteners here in town. Was about $370, from memory. I tried Blackwoods, but they didn't have any, would have to order it in, and they'd never seen one so couldn't even tell me anything about it. You might have better luck.
Mine's just the plier-style one, but is in metric. Came with a bunch of nutserts in 4mm, 5mm, 6mm, 8mm and 10mm, from memory. Have had no trouble squeezing down the big 10mm ones. But the ratchet style one would be easier if you were doing a lot of them.
When I was looking to buy, I found a heap of Ebay US listings for them, with ali and steel rivnuts in metric and AF. Almost bought one form overseas and saved some $$$s, but needed it right then and there, so picked it up locally. The only problem with it is I need to come up with more projects to use it! It's great!
Good luck!
Matto