After doing some research, I found a solution to lower my NB temp. I figure I put the solution here in the event someone wants to lower their temp. Anyway there are no after market fan for this NB, but the good news is that it does come with a screw hole at the top of the heatsink. Here are the materials you'll need:
(need two) SilenX IXP-11-14 40mm Case Fan (they are a bit expensive, but worth it because of the 14 dBA):
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
(need one) M4-.7 x 30mm screw (yes that hole on the heatsink is metric, therefore don't get the #8-32 screw like I did. It will not fit. Also it seems that 30mm is the longest length most HW store have for that thread size)
Some Epoxy or superglue, 1 plastic tie, and 4 washers.
Instructions:
First glue the fans together, make sure the airflow face the same direction. Since there are no arrows indicating air flow direction for those fans. The air is blowing out of the side where the wires are located. This is important because you want air blowing into the heatsink, therefore have the wire side facing the heatsink when mounting.
After glue is dry, use plastic tie to tie the bottom 2 center holes together. Now here comes the most important part, use the screws that came with your fans as standoffs. Keep twisting the screw until you leave the length of 3 washers sticking out. You only need 3 stand offs (top left hole, top center left hole, and top right hole). The top right center hole will be for your metric screw. Now mount the fans to the heatsink, be sure to place 1 washer at the top side and 3 washers at the bottom side to match the standoff length. Don't over tighten, just enough the fans will stay in place. You should be able to see a gap between the heatsink and the fans because of the standoffs. That's important for airflow. Anyway here are results from my machine.
Without fans (NB temperature measure w/ hardware monitor and Asus probe II):
idle: 62 C
load: 77 C
With fans, but without standoffs (fans are flush against heatsink):
idle: 57 C
load: 70 C
With fans and standoffs:
idle: 51 C
load: 59 C
As you can see, the idle temp has dropped by 11 C, but the shocking part is the load temp dropped by a whooping 18 C. I guess that little gap allow hot air to escape from the top and sides, instead of being trap in the cavity form by the fan and heatsink. Also having standoffs to the fans eliminated any dead zones. So yes it's worth it to mount some fans with standoffs to the NB, besides it's really easy to do and it works. Remember, heat kills and the cooler you could run your chips, the longer they will last.
Hope this helps with people who owns a Sabertooth X58 mobo.