The Australian Rally and LD Planner in Excel by Tim Masterson has been added to the menu bar.
Lots of other tips on Tim's Blog (https://hardtxrider.blogspot.com/search?q=basecamp) too.
Look for Oz Rally Leg Plan Tool Lite -- BaseCamp edition modified by 'TJ' Evans for Australian LD Riders
Thanks HardTXRider and TJ!