Cam Bearing Replacement

[bigsky2]

I've got a RX1 with Hyper ZT cams and one of the bearings is going bad. It makes a buzzing sound when you bump your hand against the cam. I am not the original owner of the bow so this wouldn't be warranty work. I can't seem to find a replacement bearing anywhere online. Does anyone know if the bearings are standard across different brands or are they brand specific? Anyone know where I could find a replacement bearing or have any advice?