Home Depot has a cheap 10" flourescent light fixture for like $8.
Wal-Mart has bottom of the line G.E. units even cheaper at $7
I can't say how the quality compares to the Home Depot units but at that price point, there can't be a lot of difference. My G.E. unit doesn't have a separate ground line (if it matters to anyone) but it does have a plug and a switch on the unit. It isn't one of those "shop light" jobs that you have to wire yourself.
If you do purchase a new light, make sure you wire it with correct polarization.
The white wire goes to the wide prong. Remember WHITE=WIDE.
On a lamp cord, the wire with the "rib" or "ridge" is the "white" wire and connects to the wide "polarized" prong.