Aurora 88 Piston

I've cross posted this on the repair page, but thought it would be a good idea to see if anyone here has what I'm looking for.

I recently picked up a vintage Aurora 88 that's in relatively decent condition but is in need of some TLC. Firstly, it is missing the nib and secondly, it's piston shaft has had the section that holds the washers/cork sheared off.

If anyone has any of these parts, or knows anyone who might...I'm happy to pay for the parts.

Best regards,

James