Tracing a number through iMessage

Question

Hi there,
This is my last resort. I am praying that someone can help me here.
Background:
My iphone5  was stolen on Sunday. I don’t really care about losing the phone. What I do care about is one phone number that was in the phone. I received this phone number the night before and loaded it into my contacts. I also imessaged that contact later that night.
The next day my phone was stolen and has been deactivated.
My icloud had not backed up in that time and therefore the number did not get added to icloud.
Is there a way that apple can trace an imessage that was sent to a phone at 02:12am on 5th Apr 14 (Australian Eastern time) from my phone? I don’t want the message content. I only want the phone number it was sent to.
(Yes this is the number of a girl that I met out. Trust me she is worth the search!!)
I have tried numerous ways to get the number.
1.       I traced my old phone to an address registered on icloud just before it got deactivated. I approached the house offering money for the phone! They said they never had the phone. I can’t prove that they have it as icloud doesn’t appear to be that accurate and the location is outside the house (therefore potentially just in a passing car).
2.       I have scoured google, facebook and linkedin based on the limited knowledge I know but to no avail.
3.       I have contacted my netwrok provider in Australia (Telstra) asking for a phone bill, but they only show phone calls and SMS texts...not iMessages.
I believe this is my last hope. I do believe the technology is there. It has to be. I’m not looking for locations or message content. Just the number of the phone I was iMessaging at that time.
My fingers are crossed....

Answer 1

Thank you wjosten.
Can somebody from apple help me on this?
If my network provider (Telstra) are able to freely give me details of phone numbers I have text or rang through a bill, I'm hoping that apple can freely give me the phone number of somebody I have iMessaged (provided I give them security that I am who I say I am).
If the person I was texting had a Samsung phone I would have this data via the bill. I don't see how her having an iphone would suddenly make it a privacy issue.