Whilst fasteners can be supplied from many sources, buying the correct specification OE parts will give the kind of confidence that makes fitting aftermarket pattern parts hardly worth the anxiety suffered; when the part either fails prematurely or does not even fit correctly to start with.
Any machine is only as good as the quality and precision of its fasteners.
Did you need to order gaskets and seals?
Pro-workshop gasket sealant: 08C70K0234M to complete the job like a professional.