Complex sentence: Playmates Toys produced a limited edition Captain Calhoun 4.5 inch action figure which was available only via mail order through the "Star Trek Communicator" fan club magazine, and began shipping in September 1998.
Split into simpler sentences: Playmates Toys produced a limited edition Captain Calhoun 4.5 inch figure for the Star Trek Communicator magazine. The figure was available via mail order only and began shipping in September 1998.