Just noodling around... Could you "hard-code" the text that needs the strike-through by using an embedded font for just that limited text string? I mean by using a font face that actually has a strike-through slash across the glyph.
I saw this font, there must be others around. Or perhaps someone could edit an open-source font for you.
https://www.dafont.com/jmh-typewriter-mono.font