Some Smiths tracks were bootlegged as instrumental versions at soundchecks.
Instrumental versions of 'Stop Me If You Think You've Heard This One Before' and 'This Charming Man' have been pieced together using the mastertracks supplied for one of those guitar computer games:
https://youtu.be/Th1-60uY3Dk
https://youtu.be/Gq44CdUPk0A
I still dream occasionally, that in another world where Morrissey stops blocking any further Smiths re-issues, that we would get lavish boxsets of each album, including full instrumental versions of each album, along with other discs of outtakes, and different versions and mixes, etc. Oh well, maybe in 30 years, when either Morrissey or Joyce has either died/and or buried the hatchet.