I got a Flexz Lever belt from Amazon; it's an Inzer clone that costs 1/4 of the price.
If you compete only certain brands are accepted, like Inzer or Rogue.
Inzer has the worst customer service, you give them money, and you get no communication for 3 months. Then 2 months later a belt shows up on your doorstop. You should grovel and be thankful. (At least that's their mentality).