Where could I find that HOMER resource data?
To download resource data from the HOMER website, you'll have to sign in with your email address and password, then click on Sample Files in the Download section of the navigation bar at the top of the screen. You'll get a drop-down box from which you can choose to download TMY2 solar data (hourly radiation data for 239 locations around the US), sample hourly wind data, and some synthetic wind and solar radiation data for the Philippines.
In case you haven't noticed this before, in the solar resource inputs window if you specify monthly data there is a button labeled "Download From Internet":
If you are connected to the Internet, that button retrieves monthly solar data for the specified latitude and longitude from NREL's and NASA's satellite databases. Give that a try, it's really handy. If you specify a lat/long outside North America, HOMER refers to the NASA SSE dataset.