Two Files - Then Go!

I need some help here.

I run a report daily for my company that is all Applescript-ed. It requires two Excel files that come through email.
The problem is - they are not sent at the same time or in the same email, or even in the same order.

When they are received, they are automatically added to my Dropbox folder (that Hazel is monitoring)

I need Hazel to see when both files exist, then run my script.

Is this possible?

You can try monitoring the folder that contains the folder which contains the files. Then write a rule to match the folder and have it match when it's file count is 2, or some variation on that.