The best Porsche only body shop in Cleveland is located in Mentor, OH called Panelwekrs. The owner is a former Stoddard bodyman and opened his own shop 15+ years ago to specialize in 356 restorations and has added British sports cars. He also works on an occassional 911s, turbos and 914s that need his help.
http://www.panelwerks.com/
As a very satisfied customer, I highly recommend their work.