Get x,y of a character in a TextField

I have a text field tField that’s right-aligned, and whose width changes. As the width changes, the position of the first character in tField.text varies with respect to tField.x, since it’s justified to the right. (I tried to illustrate it but the interface keeps messing up my spacing.)

I need to put a small symbol (MovieClip) next to that first letter, and I need it to move with the first letter as tField’s width changes.

So I’m looking for a way to get the x-coordinate of the first letter of tField.text at any given time. Thus far my searches have turned nothing up. Is this possible?