The Dr Tuba generic leading edge bladders are a saviour especially where the original bladders are no longer available. It is a basic leading edge shape that you can add the correct valves too, building up a new one.
Measure the length of bladder you need and if not exact, go one bigger (Never smaller). You may be able to use your existing valves by sticking it on with StormSure Glue or, for ease, pick the Dr Tuba replacement valve you need and simply make a hole in the blank and stick it on.
Designed to be used by repair centres or experienced repairers.
This leading edge bladder is 1100cm long.