You can call the apache server locally using the full name, your address will still be 127.0.0.1, you might be over thinking it.
Grab the file from my gist, chuck it in your website root folder, modify its url to your server, then call it with your key in the url like it says in the comments. Use a key the can call cron (doesn't need to make tickets), let cron make the tickets.
What it does, is says to rcron, here's the key you need, call Apache from 127.0.0.1 and send them my key. Boom, works fine.