There is only one Porsche 959 Speedster which, further to an accident and barrels, was transformed into version convertible. It is about Porsche 959 of 1987, belonging to German which had to make a decision to continue to make it run further to this damage.
During the repairs, he decided to make a unique and original model by transforming it into discoverable version: 959 Speedster
But I do not find the name of the person which realized this realization