Sorry to hijack the thread…
Car Mount - https://www.tigersupplies.com/Products/Seco-Single-Mag-Mount-with-Quick-Release-Tip__SEC5114-051.aspx (They also make a tri-magnet for rough conditions.)
Rover pole - GPS Quick Release Adapter (Leica) Tiger Supplies
Rover - AdirPro GPS Quick Disconnect Adapter 765-02 Tiger Supplies