Really tough! No answers but try...

kamasutra.  I had an appointment at 9 pm with a well reviewed provider that I set up days in advance (she had a very good excuse so what could I say?) and then tried kamasutra.  Not a grueling screening process and then you get there and have 3-5 girls to choose from.  Not true GFE but the girl I saw was a bit like making out with my highschool girlfriend if you like to go down memory lane (a note to those wondering:  she was at least 24 or 25 but a student).  I forget the url but just type in 'sutra' in the email search form and it will come up with names of providers they feature.

Try Courney Carr

go thru a screening with her & tell her waht your schedule is like then I bet she will work with your time frame.