[Dabble Inn]

Have you mic'd the diameter of each one? Are they the same size? Either way I'd still use the metal ones, check to see if you have a bearing store near you. Something like a 'Kaman Bearing' or whatever, take the seal number with you. Around here if they don't have it in stock they can get it overnight, it'll probably be a better seal anyway. Like maybe a 'Timken' etc