I'm sure you have to get the doortrim panels off and detach the handles from the inside.
If you want to find a specialist, here's a directory link for you:
https://repairpal.com/land+rover-repair-in-winnetka-california
RepairPal Certified shops can diagnose and repair your 1993 Land Rover Range Rover. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.