look on both ebay and amazon and you will probably find new correct keyboards for your laptop, at vastly less than the Acer price.
Possilby the Acer price includes fitting.
Suggest using google, to find out how to fit the keyboard, There should be both video and instructions available. Generally this is easy.
Please advise back, what you decide. As a matter of interest, where are you located? I am in Hammersmith, West London.
Good Luck - Keep us posted.