REI, although I've only used East Hanover, Ann Arbor, and MO. Bicycle II on Route 17. Wycoff Cycle. Campmor has some stuff, Dick SG too. For a Varsity, you can also get the basics at Wallyworld, like chains ($10), cables, pedals, tubes, etc.

Hugh is the king of metal rejuvenation.

http://hughsbicycle.blogspot.com/