I have only used the regular 5 buckle latch style.
The only belts I would bother shipping for recert would be the more expensive ones, including cam lock.

I just sent my RCI "Platinum" belts back for recert/webbing. These cost about the same as other belts, but they give you a coupon for a one-time free recert. Now they charge you $20 return shipping, and it cost me almost that much to ship them to RCI, so it didn't save much over new ones ($65).