General :: Custom Email Tones For Specific Contacts

I have been a Blackberry user for years, and finally ditched my old berry friend, for a Galaxy Nexus. Thus far, I have had to Google how to's for everything I've wanted to customize: ie ringtones, changing default tones, even the colour of my sms window. I've been able to figure everything out, but am stuck on creating custom tones for emails from specific contacts. With my trusted berry, custom tones for email and sms were linked together for my contacts. So whether I received a txt, or an email from "John", I would hear the specific tone I'd set for him. With my Nexus, I've learned the same is not true. I can only customize contact sounds for sms (and of course, only with an App, I really like Ringo btw). Emails, not so much. They all come in under the one tone, regardless of who it was from.