You can find all SRAM replacement parts and components at Escapa, such as the SRAM Red eTap AXS E1 Left Disc Brake + Electronics Replacement Kit, which can be used to replace parts in the event of a crash or malfunction.
In case of a crash, malfunction, or damage, SRAM offers the SRAM Red Etap AXS E1 lever along with the replacement electronic component.
Specifically for the left side.