Extra Connector for GT-50 or T-30 - $8
Or make your own with part numbers:

• Pins: Molex 16-02-0103

• Connector: Molex 50-57-9404

Black Screw set for GT-50, FC-10, or T-30 - $2

• #6-32 X 3/8” Length Screws. P/N MS35214-25