Here is a link to a kit that has all of the parts necessary to re-build the top end on your bike. You will need to match the piston size to your cylinder. If the cylinder needs a re-plate, send the piston (A size preferable) with the cylinder to the plating company.
https://www.ebay.com/itm/12177392254...0AAOSwU91ad0zw
Re: reeds. If they are chipped at all, or if you can see daylight between the petals, they should be replaced.