Is there a way to repair a valve stem rim hole?

[Jon]

Well I just got the bad news that I need a new rim because the area
where the vlv stem seats is deteriorated and leaks air out very
slow. Is there anything I can do to fix this or just bit the bullet
and buy a new rim at a cost of $400. It takes probably four weeks to
notice that the tire is under inflated. Thanks Jon

PS. IF I haft to buy a new rim, where is the best place to buy one?

Jon
Jipjob
Rebel Bird
Bremerton Washington