Yes they are a Canadian version of a Chevy Aveo not a Spark, but I have no Idea if the under bumper supports are the same as the Chevy year to Year. If I were to bet on it I would say they are, but as the Wave uses a different Facia, it may differ.
So in the US it would be a Pontiac G3, I suspect those parts would be the same, but they only sold that model in the 2009 Model year, and as that was the official last model year for Pontiac ( I know they badged some G6's as 2010's and also a few Solstice's) they were very few sold in the US. But they may be available used from salvage yards.
Good luck
Sorry I am not a Canadian Pontiac expert.