IMO, some guns should be thrown away. This is one of them.
Cost to fix will be on the high side and your talking about a $300 junker when new. What could you possibly sell it for that would even justify a$100 smith bill? The real danger it poses to users
and the temptation it will pose to someone to use it as is w/o fixing is too great. Destroy it and you will make the world a safer place. just an opinion. take care.