I made several of these but I now see I haven't added these to the library.
But I could make a new one pretty fast I think, depending on what you want.
"A problem" for such a module is that it needs a whole lot of controls to set all the stages, this poses a couple of problems:
-if you put them all on the same module for lots of stages, you'll get a MASSIVE module, which might get hard to control externally (lots of midiCC in case you want to control it externally).
-if you want the controls externally, this will again need a lot of inputs/external knobs and a way to choose how many of them you'll use and how to control them externally.
-plus all the extra settings of how the envelope should react at each stage (eg. curves, looping points for sustain part)
I'm thinking about a "modular" variant in which the times, amplitudes/goals, curves, looping points and sustain points are saved in an internal table, so you can select which stage to edit and then the knobs get updated to that stage so you can edit these internal values. Then you could use the table load/save modules to get these values onto your sd-card for later use in other projects.