[texhax] Justification through glyph variants

[Joel C. Salomon]

In some older Hebrew books, and in Hebrew calligraphy, a technique used
to align text to the outer margin is stretching letters.  Certain
letters are particularly stretchable; in fact, Unicode has several "wide
letters" encoded in the Alphabetic Presentation Forms area.

For reference, compare:

   א = ﬡ, ד = ﬢ, ה = ﬣ, כ = ﬤ, ל = ﬥ, ם = ﬦ, ר = ﬧ, ת = ﬨ.

At any rate, is there any way to make (any version of) TeX use these to
help justify lines?

--Joel