So .... I've been trying to get a grasp on the best way to book a DONE3 ticket given the following circumstances:
1) I live in texas
2) I need to be in instanbul turkey for work by sometime Tuesday or Wednesday.
3) I have a friend I would like to meet in manila the next week and then return after a week to texas
4) I am confused

Basically I want to travel, DFW > LHR > IST > MNL > DFW ( I realize there are some necessary segments between these like HKG etc)

I flew a RTW ticket back in 2002 that was issued through AA at the RTW desk.

The problem is that I don't meet the advance purchase requirement for TS1.

To solve this little dilemma, I figured I could buy a oneway ticket to LHR from DFW. Then, get a DONE3 RTW ticket issued in london and travel on that via the above route back to DFW. Then, when I need to go back to turkey for travel (prob in July), just use the remaining portion of the ticket and purchase a new RTW ticket in london to continue on.

My problem is that I am at a lost of who exactly to talk to about having a RTW ticket issued outside of AA. I assume the AA RTW desk (which is AWESOME) will be unable to do so. Do I just call BA and ask for the equivalent (which I also assume includes tea and crumpets in the name)? Am I already past the necessary time to get a ticket issued even outside of TS1?

Any help would be appreciated esp. given the short amount of time I have to make this work ... if possible. I am trying to avoid the age old adage of when you assume you make an ... out of you and me. (from my seventh grade teacher ... she loved me)