Thanks for that scotty. I emailed Paul, but he informs me his battery cases are rubber and it's the battery inside that 'firms them up'. Not what I had in mind, and whilst I could, frankly I can't be ar**d to start making moulds to create my own cases. I don't want a jelly mould, I want a rigid case. Do they still make those original 6v rubber batteries? Maybe I could buy one and then scoop out the interior whe it expires as I used to do decades ago.