I don't - perhaps Bruce will. He may even have it listed in the on-line store - he has most things. Essentially bentonite is a type of clay, whereas most greases (by no means all) are soap-based. To switch from clay-based grease to soap-based grease would involve dismantling and degreasing the transmission, and might involve a reduced transmission life after you did it, so it is not a good solution unless all else has already been found to be impossible. I'm told all Peerless and Tecumseh transmissions use the bentonite grease, and it is readily available in the US.
