easy DIY; they come as a sealed unit; shop around the motor factors or shop4parts; about £35 I think; ABS & non-ABS completely different; only difficult part is getting the drum off over the brake shoes so make sure handbrake cable is slackened right off and remove the plastic cap on the inner side of the backing plate and then you can lever the handbrake lever inboard to free the shoes up more; you may need a hub puller but if the bearings shot it will all just fall apart; will need a big socket for hub nut (cannot remember size)