Is it possible to just purchase just Outlook for Mac? I previously purchased Office for Mac without Outlook and now just want to add Outlook??

Fairly recently I purchased Office for Mac for my MacBook Air.  I did not get Outlook at the time because I was using the mail program that came on my Mac.  Now I'm interested in adding just Outlook, but all I find is pricing & downloads for the entire Office suite.  I cannot find any pricing or information anywhere (or an email or phone number to call... arrrgghh!) to ask if it's possible to just get Outlook.