Lots of different options, get a surge tank from Wahl or you can just buy a plastic bottle like the aluminum one, but its plastic. Racers Edge used to have a pic on their website but I see the website is no longer working. Maybe someone else has a pic?
Anyway, here's a link to the wahl website and to another thread on this site about coolant bottles.
Dave B my sled does have a surge (expansion) tank now it is just a bad design of tank and cap from Polaris....The cap grinds the plastic and ruins the bottle. Does the image you provided have a twist on cap?