Damaris is not working with another agency.   Escorts come and go and there are many reasons escorts retire.  Some find a sugar daddy (PLM) to support them, others get married (legally or Mexican style), and the list goes on.  Obviously some retire for good while other return.  Only time will tell what the future holds for her.

Many escorts who retire continue to see their favorite clients clandestantly.   Meaning before retiring they give their phone number and/or email to their favorite clients who they trust to keep their mouth shut.  In like manner agencies are able to continue booking dates for her preferred clients.   If you can't find her it means your not on "the list" ... or she truly retired.

I figured I must have missed her. There was another tall, thin and slightly busty gal with one of the other agencies that I was trying to find for my upcoming visit but I can't for the life of me remember her name or which agency and I haven't seen her on either of the other popular agencies. I guess I need to try and do longer trips if there are girls that really catch my eye.

Thanks for the info!

Seems like Belfast might be an option.  Tall, killer body, nice boobs (maybe implants).  See link.  Based on what you seem to like you might also consider Andrea of Musas (rumor is that she has bad attitude though, but YMMV).  Looks like Mar of hottijuana is also tall.  

Finding tall chicas in Mexico is a hard find.