It hides in plain sight.
The truth of the matter is that--while it may not be on the menu--just about any Thai restaurant will make
ba-mii for you. Both
ba-mii haeng, or "dry egg noodles," AND
ba-mii naam, or "wet egg noodles."
That said, I would strongly encourage you to visit one of the board favourites for these items: Sticky Rice, Spoon, TAC, etc.
At both TAC and Sticky Rice, ask for
ba-mii tom yam.
Regards,
Erik M.