Just checked out the Milo site myself, if you want a good set up for belt squats I would go with:
1220 super squats hip belt, small/med/large/X large $99.95 USD
1220a daisy chains to connect to a bar $15.95 per pair
1314a large carabiner $6.00
1314c Olympic plate holder $36.95
1200 Super Squats book $16.95
so for $175.80 postage you will be set up nicely, cheers, ash