whats the best one for the S

 

Are you talking about a "service manual"? The maintenance schedule is included in your owner's manual and owner's package that came with the car when purchased new.
Try helminc.com for the service manual and even an owner's manual if you don't have one.

 

Factory manual.

Go to this link and it is near the end of the list.

http://handaccessories.com/s2000-04.html

 

i was looking for more like a haynes or chilton manual and havent come across one

 

There is no such thing for this car. It's a full blown service manual or nothing.