If you are buying it from the Office Website, they are listed on the bottom of the page:
http://office.microsoft.com/en-us/buy-microsoft-office-2013-suites-and-office-365-subscriptions-FX102886268.aspx?WT%2Eintid1=ODC%5FENUS%5FFX101825658%5FXT103927654
But if you purchased the suite, I think you need to get the entire install.
Thanks.
Assuming you are using click to run to install Office 365, you can't pick and choose from the office apps at the Click-to-Run application level. If its an MSI download, you can configure apps.
Here is a same topic thread which has been there already:
Tony Chen
TechNet Community Support
- Marked as answer by Tony Chen CHNMicrosoft contingent staff, Moderator Sunday, February 09, 2014 6:34 PM