Can you use a front bumper from Mitsubishi eclipse or Chysler sebring for my Dodge avenger?

No, you cannot use a front bumper from a Mitsubishi Eclipse or Chrysler Sebring on a Dodge Avenger. These are completely different vehicles with different chassis and body styles. The mounting points, overall dimensions, and even the shape are incompatible. Attempting to do so would require extensive, likely impossible, modifications.