Its a bit time consuming (hour?) but otherwise easy to get it from the mythic recipe
I exploit the game quirk in windowed mode.
It works for augments and the "?" cube recipe:
Start game, try recipe. If it is not desirable result, quit the game by "X" the game window - this way the result is not saved.
It is quite safe to do that if you start the game fresh and quit the game window immediately. Works only in windowed mode.
This way I got 6 event +skills for my engi (she has now +16 skills and a happy drone) and during the many tries it offered several glyph cages, beamcarvers, and even the gatling.