I found out that there are
cmttb10 fonts available. Unfortunately they are not used until I activate them with the
\font macro, so just searching for those fonts is not possible.
cmbtt10 seems too thick. The
cmttb10 looks quite what I need, but its characters are too wide. Both seems to be a low resolution font.
I also learned that these fonts are created with METAFONT the first time they are activated, but need the Typewriter Type font source. Are there other fonts that are created in the same manner from Typewriter Type? Is it possible to create a better resolution (like 600~1200 DPI)? How difficult is to define my own modification?