Andres
Puritan Board Doctor
The new Foundations Psalter from SermonAudio has these markings!One good resource for dealing with the syllables in the SMV is the edition of the 1650 found at the end of the Sing Psalms psalter (released by the FCOS). You can see the PDF here:
Sing-Psalms-Combined-Words-Edition-incl.-Scottish-Psalter-with-bookmarks-Tune-Reccomendations.pdf (freechurch.org)
It has markings to show when to hold a syllable and so on. Very helpful as you learn the psalm book. It is too bad that no recent printings of the 1650 have this feature (as far as I am aware) as getting a hold of a physical copy of Sing Psalms on this side of the pond is a bit difficult.