Well subhub65, you are certainly on the right tracks.
I saw Mistress Tyra Von Stern a long while ago. Used to be based Downtown, and I would make lunch time "pit-stops". Last I heard she was located in the Kits area. Quit seeing her when she moved away from Downtown (nothing she did... I just had too many other conflicting things going on in life).
Tyra is reviewed on this site. I recall her as good looking, great legs, statuesque in heels, and more than capable of doing what you are looking for. But, be careful. She has a big thing about cleanliness. One day, I forgot to take off my shoes, before moving on upstairs to her playroom. I was too busy talking with her and forgot the golden rule. Boy, did I get Sh*t!
Some reviewers have mentioned that she is a little difficult to get hold of and sometimes does not return calls. I didn't have that problem personally. But then again, if you are looking to book a half-hour or half-day in advance, that will not work. Try dropping her an email via her site. As you are a first-timer with her, it may take a few days, possibly longer to get the ball moving, but it will be worth the wait.
Elektra - I have no experience with.
Mistress Divona. I do not have permission to review her. That being said, very intelligent, attractive, classy person. Located Downtown. Visit her website, it will tell you a lot in her own words. In my opinion, this is your number 1 port of call.
Good luck!