Hi - Newbie alert!!!

I joined becasue I want to pump the oil out of my seat ibiza copa 1.2 DSG (mk IV) and so I bought this Electric 60W 12V Transfer Pump Extractor Oil Fluid Diesel Car Motorbike UK Sales | eBay

My problme is that the 6mm hose that came with it is so tight in the dipstick hole I can only push it in about 6 in.

Any links to suitable diameter pipes I can buy that people can suggest?

Alternatively, does anyone know the inside diameter of the distick hole - yes I can measure the stick and thats only 3mm!!

Cheers,
Kevin.