In terms of producing stereo from a mono input, you fake it!
Basically, you put the mono signal onto tracks 1&2, then phase some (or all of the frequencies slightly differently (i.e add a microdelay). But luckily, there's many plug-ins that'll do this for you so it sounds reasonably realistic - frinstance, I usually use Imager in Ozone 9. It does the microdelay-at-frequencies thing, and allows you to "stereoise" further. It does this by using the concept of "M&S" (not Marks and Sparks, but Middle and Side or even Mittel und Seite as if was invented in Germany!).
In this, M= track 1 + 2, S = track 1 - 2 so S is the difference between the 2 tracks. In that way you can make something more stereo by boosting S, then recombining to make tracks 1 and 2 (i.e. (M+S)-(M-S)= 2M+2S).
As for "point stereo" in-ears, they may work using "binaural" rather than straight stereo.
In ordinary stereo, you record with a pair of crossed mics, i.e both in the same position but ends about 1-2" apart. In binaural, mics are placed the width of a human head apart - the idea being that it gave a more natural reproduction of space, especially with headphones and was popular in the 60s and 70s...