Use Newegg coupon code EMCJNNF77
Newegg has this Rosewill RFA-120-BL 120mm 4 Blue LEDs LED Case Fan for $4.99 after instant savings. Use the coupon code and the price drops to $3.99. Shipping is free. Amazon
has this same fan for $6.99. It features a 3/4 pin power connector and comes with a 1 year warranty.