Good afternoon, I just bought a 1984 Beneteau First 29. To my surprise the boat came with a spinnaker (the seller didn't know he had one). As I sometimes sail solo, I am looking for a spinnaker sock. Would anyone know where I can buy one and what should I be looking for (length of the sock, other?) - are all the spinnaker socks for First 29's built in 1984 the same ? Many thanks . Chris