Heller 1/100 H.M.S. Victory

          I need imformation on how can I get the missing parts  for the 1/100 scale Heller ship model H.M.S. Victory. It is the tree no.#4 which contains the parts to build the canons. I have 3 to many parts of the no.#5  and I need 3 more parts of no.#4 trees. So if someone can help me in getting the missing parts, or aadress on who I can get in touch want it that would be great to.