I got the back bumper of my Indigo for 2.8K and just had to do painting.
Check with local spare part dealers, u will get it cheaper there.
Take approx 2.5 - 3.5K it should not be more than this including painting.
Recently I got the front bumper of my HYUNDAI i10 { 1.2 Kappa VTVT sportz model and blushing color - Metallic } replace with full paint from one of the Hyundai ASS who charged around Rs 5,000/- Please note this does not include the front grille. It is a well known fact that all ASS people charges a little more but the quality is good