sort: unfold case?

[gregory mott]

hello gnuists,

now that locale sorting is de rigeur, i find sort wanting of an option
to unfold case.

it is not always desirable to abandon all the varied attributes of one's
locale by specifying LC_COLLATE=C sort.

in lieu of that or in the meantime, i am busy looking for how to define
myself an auxiliary locale with case unfolded.  does anyone know if it
can be done with a simple "reorder after" and specifying a couple
symbols?  is there a better place to ask this question?

thank you,
greg