Buy from a Huge Range of Interior and Exterior Doors Online from Corinthian Doors, Hume Doors. Competitive prices for Doors Online with Fast Sydney Delivery. Ordering is Easy. Megatimber stocks a wide range of internal and external doors as well as cavity sliders. We offer a range of door accessories like door jambs, architraves, screws. Our internal doors come in a variety of sizes and come in primed MDF or timber or solid core. Our external doors come in solid timber for durability and in a range of sizes including extra wide doors.