Aluminium Offcut wanted

Hello, can anyone help with an offcut of aluminium alloy 2024-T3 or similar which is .063″ thick. I need an offcut about 36″ by about 5″ to make a couple of angles for the tank bay cover fixings on my DH88 Comet project. I thought I had enough to make them all but find I am a bit short and don’t really want to buy a 4ft by 2ft sheet.
Thanks
Ken