Washer pump

Hi all. I had a leak from my screen wash bottle an after taking it all out an finding it wasn't leaking from the bottle :(, but putting it back together an filling it I saw it was leaking from we're the pump goes into the bottle, I pushed it right down ect but still leaked , will I need a new pump or just a rubber washer or something? If its a pump does it have to be from a Vrs or will any from an Octavia do?

( this is bottom of my pump)

Cheers

Mike