This one is for the brick and mortar shoppers out there.
ARLT Computer is a store chain that can be found in the South of Germany.
They offer a LiteOn DH-20A1P (PATA) for just â‚¬ 19.99. That's rather cheap, considering most retail boxed drives cost twice as much.
Check it out: http://www.arlt.com/pc+komponenten/laufwerke/dvd+brenner/ide+oxid+oxid/liteon+dh20a1p+dvd+recorder+20204832+ide+schwarz.html