Adding 3rd party ringtones to iCloud

[JW26553]

I am attempting use a ringtone I downloaded from a free App in the AppStore. The instructions in the App say I must sync the ringtone(s) to iCloud before I can use them like the default ringtones that came with the phone. I have sync'd my iPhone5 with iTunes, and belong to iTunes Match, but I cannot find the ringtone anywhere in iTunes. It does not show in my list of ringtones when I attempt to assign it to one or more of my contacts.

I have upgraded iTunes to version 11.0.0.163.

Questions: 1) What do I need to do to "see" my ringtones in iTunes? 2) What do I need to do to make the downloaded ringtone available for use with my contacts on my iPhone5?

Thanks!