Yeah pretty unlikely to find a good 2nd hand bonnet on Fleabay.
Good panel shop should do an easy fix like that.
Make sure the underside cut outs get tapped when the bonnets fixed or the bubbling will happen again.
Loving my DS4 DSport - 1.6 THP160, EAT6 speed auto, Blanc Nacre
"Most Beautiful Car of the Year, 2013"