Download Zedge app from your respective stores and search warframe. There are not a lot of ringtones, but they have several.
The sound your phone makes when it gets a call or text message
Freaking post full of rammus
Good ringtones btw m8
Go to Download Kit. One of the folders in there has Ringtones made from DE.
Edit: going through them again myself. Some of the month folders have ringtones, too. One has Darvo, and I'm listening to Ordis ones now.
What do you think?