Hi Jan, welcome to the collective. First of all you need to get your questionnaire back to Tim to get full access to the vast amount of information on the forum. If you add your location to your profile it can often help members give you advice about parts, Damen and Kroes I suspect will be your major source being in the Netherlands but I am sure David will put you straight about them. I'll try and find out some more info about the steering pump for you but I am sure others will be along with some suggestions soon.

Nich.