The strut mounts can be ordered from your local GM dealership. Part # 95015324
I paid $60 Canadian total for both.
Save your money and avoid aftermarket strut mounts.
If the struts need replacement; rockauto has the GM original struts for half the price found at the dealership. The parts below are hidden in the 2009 Aveo parts section.
ACDELCO Part # 506802 {#506692, 506769, 96408661, 96653231, 96980824} GM Original Equipment (LEFT - DRIVER SIDE)
ACDELCO Part # 506803 {#506681, 506768, 96408662, 96653232, 96980825} GM Original Equipment (RIGHT - PASSENGER)