Gosh. Varley batteries are expensive. I know it's not much help to you as yours is the bigger Red Top 30, but for someone looking to replace a Red Top 25 the Lucas one is worth considering HERE It might be worth changing the tray. You could get the new tray and Lucas battery and still have a lot of change in your pocket. Drilling out the rivets on the tray should only be a few minutes of a job.