Clutch Master Cylinder

I have taken the master cylinder apart see pictures.  There was some rust inside although the bore is reasonably OK.  I don’t know that you can purchase replacement seals.  If you can I might see if that does the trick as its clutch not brakes.  This Master cylinder is used on the Alfa Romeo 105 but that one has a bore of 19mm not 22.3mm which the lambo one has.