Your best bet is Newegg.com. You will be satisfied with a Pioneer 111, a BenQ 1655, an LG 4167, or a Liteon (as long as you get the test firmware for the -R lead in problem).
These drives are all under $50 and almost always hard to find at a regular store.
Avoid BTC and Plextor (price) and Samsung, and AOpen and Optorite. Many brand names such as HP and Sony use various different drives so you should avoid these as you are overpaying for someone else's drive and you won't be sure what you get.