the intake focus intake cam will work but the exhaust cam will not due to the cougars having VCT. in all honesty, the stock cams actually have a decent profile but you can get more power out of them with a set of cam gears. if you have the money then i would suggest buying the FRPP focus head, a set of focus cams will then work, cam gears, and a tune. you can then turn off the VCT via the tune as well.
there are numerous places that you can find the parts and a quick search using "focus" instead of "cougar" should turn most of them up. my preference is
massivespeedsystem and
C-F-M