Belt - squats?

Does any one know a source for a belt squat - dip harness?

Irondmind sells the hip squat belt:

louie sells one as well:

we use the ironmind belt and it works well, comfortable, adjustable, and does what its supposed to do

They are cool. A nice addition to the normal squat but you need to have one that actually works. A friend of mine bought one that was just impossible to use. I guess Louiseā€™s one works though! Then there is the little problem of overload. Depending on the leverage you can need a lot of weight!