Depends what you're looking for...
Kennedy's ENG/EFP in Euless, Tx (Dallas suburb)
If they don;t have it...can't get it; you don't need it. (817)-283-8321 (kenndyseng.com)
Photomart in Orlando, FL. (photomartusa.com)
These are my major suppliers...camera batteries,lighting equipment, wireless parts, etc.
Other batteries & expendables...Eclipse lighting.
Best tip. Don't be afraid to shop around & compare prices. Helps to keep a log of who's cheapest of certain items, who has best service, etc.
Another thought...on certain items like tripod parts...it might be a good idea to set up an account with the manufacturer directly. Sometimes you get better pricing.
Work the web & the phones, you'd be amazed at the savings.