Indentification Assistance

[Claudia]

Does anyone know what these two parts are called and if they can be purchased individually?

Part on the left is a metal cover held in with a single screw which covers a hole in the floor under the rear seat bottom.
Part on the right is a metal retainer for the rear taillight wiring harness which is located behind the LH rear interior panel.

[anlauto]

You can buy the metal floor plugs, but I don't think that bracket is available in reproduction.