The tubes and shop fixtures you can buy at Home Depot or Lowe's. You'll have to buy the cord/plug too and wire it up yourself and maybe hardware/chains to hang the fixtures. Tubes are like $7-12 for a two pack. I don't remember how much the fixtures are. I bought one used from an LACPS member for $5 and another fixture from a hydroponics store - all wired up with a switch and hanging hardware for maybe $20-25. Fixtures from Lowes, HD or WalMart will probably cost you $10-20 each. You can probably get T8 fixtures which will give you a little more efficiency.
You could always try your local head/hydroponics shop. There's one in Buffalo about 20 miles from your zip code. $114-130 for 4 tube fixture including tubes: