can anyone put me in touch with a greek-speaking in-call provider on Long Island or in the NYC area?

Domino,Alana or Angelique from Julie's, you can't never go there

Maxine from Vintage Pink.

Both greek and BBBJNQNS(she swallows) are on the menu.

Good Luck!

Try Chrissy at BDJ.  RAVE reviews.

My advice would be to avoid Maxine if you expect full anal penetration.  Invest some more money and see one of the Greek speaking escorts at Julies.