Honestly, if they can replace the bumper/plastic chin piece with new OEM pieces...you should do it. Give them options to make it right.
When it's completed, make sure to look at it under all light conditions (outside, inside, etc) and check to make sure it matches correctly. If it checks out, buy that baby!
2013 Mustang GT - 402A GT/CS - 6R80 - Glass Roof - Engine Block Heater - SGM Exterior - CB/Miko Interior
Steeda Adjustable PHB (Street) and Steeda PH Brace, Stainless Works Retro Catback Exhaust...