You tried going to https://www.msl.ubc.ca/sites/default/files/shRNA%20MOUSE%20library%20at%20Foster%20lab%20UBC_web.xlsx, and it doesn't exist. All is not lost! You can search for what you're looking for.
https://www.msl.ubc.ca/sites/default/files/shRNA%20MOUSE%20library%20at%20Foster%20lab%20UBC_web.xlsx