Without looking, where does Western Express run? Which areas, I mean? Also, when you ask specifically for a lady team partner, are you gently stating that you may be open to something more than a work-based partnership? How many years of experience must your potential co-driver have? Do you require that she have good hygiene? Will she be expected to pull her full 11/14--will she be required to have full maneuvering capability? Surely, you have more requirements in someone who will hold your life in her hands than that of her having been born female?
The more specific and detailed you are when you make a request, the more likely it is that someone would answer you! Besides, many of us "ladies" LIKE details...lots and lots of details!