I hope I'm not too annoying with all these questions :P, maybe something like this? http://www.nteinc.com/specs/2900to2999/pdf/nte2987.pdf
Could you also tell me what exactly am I look for? N-Channel MOSFETS?
Mouser shows that at $7 a pop: http://www.mouser.com/ProductDetail/NTE/NTE2987/?qs=sGAEpiMZZMutXGli8Ay4kFfMPLZ9xW8yKOlRS6m%252bwN0%3D
Sparkfun sells a logic level N-channel power mosfet for a buck: http://www.sparkfun.com/products/10213