Most auto parts stores sell the AI replacement kits as so - the plugs are M12-1.25 oil drain plugs. The vacuum caps are 3/16" (4,76 mm). Wipe clean then re-use the copper gaskets that you'll find when you unscrew the AI tubes that go into the head.
The big hose can be capped by folding then securing fold with a wire tie, or take a section of hose to the harware store or auto parts store and ask for a plug to fit air tight.
