I actually bought one of those, the Top Shelf multi-layered pad (MLP) (http://www.aerotechdesigns.com/metopshmlpch.html), but they are 35cm. long, about 5cm. less than the other Adidas bibs and shorts I have. I've see some Pearl Izumi winter bibs with a longer pad (which I guess is to keep your boys warm), but PI does not sell the pads separately (not that I know of).