Special Types Of Ballgag

Hi all! I’m searching online for a ballgag where the tube runs right through the center of the sphere, connecting it to the strap. We use up lots of bondage clips each week, and usually the straps cause rubbing and chafing around AJ’s mouth corners. Eventually, this means we have to take a break from using the ballgag for shooting sessions. Can anyone suggest where I might find one? I could also send over pictures of JB Roper’s gags since she owns several.