EBAY or midwayusa. watch it on ebay tho, as a lot of the parts come from china. quality isn't usually too bad, but you have to wait a month for it. ncstar makes a cheaper one.
Always wanted a FN2000 I think they're kind of neat and being used to old Mauser bolt actions and the M16A4 I think it would be a nice change up. Get my feet wet on a different style of rifle... Fn2000 or Styer Aug and I'd be set.