Most likely I have a set of used coffin arms on the garage, they came out of my 987CS, but you first should check if they are interchangeable with the ones on your car.
I believe that you live near Palm Springs, if you pay for the gas (and a beer afterwards..
), I could help you to replace them, I don't live to far from you (92886) at this time I am currently unemployed and recovering from knee surgery... so you will have to help :-)