New parts like this are never going to be cheap, but if the old tap is damaged then trying to repair it will be time consuming and it may still leak even after the repair?
Save time and take an easier route by simply replacing the old part with a brand new ready to fit Fuel tap; which will not leak (or be terminally blocked!).
There is nothing more annoying than a leaking Fuel tap! We are the company that seeks out those difficult to find bike parts. No company does more for classic and modern Japanese motorcycle enthusiasts.