here are a few places you had better check out:

for information:
fastcougar.com/forums
teamneco.com
dv6cougar.com
fordcontour.org
contour.org
for parts:
customcougars.com
fordpartsonline(oem parts real cheap)
duratecperformance.com
and i know there are others those are just the ones i have experience with. note: i am not in affiliation with any of the parts places i have listed i am just listing for everyones knowledge. if you know of more please post them.

other good sites:

parts

http://www.ctamotorsports.com/---good intake for I4(among other things

http://www.zx2racing.com/store/ another good site for the I4 cougars they have a very nice stage 2 esslinger head

www.gude.com---turbo and head packages for I4's