I'm going to spitball some stuff here now,
So for front variators there are 2 options, the polini and the malossi.
But MAYBE anything that will fit a CPI/Keyway 16mm crank will ALSO work.
Looking at the star nut for the front drive face they also have a 15mm spline with a 16mm od.
So that means also a Stage6 Sport Pro kit will work, and further if you took the ramp plate from the sport pro possibly make an R/T Variator also work, Unfortunately though the drive face from that is splined directly and wont work.
This also means a bunch of front plates may fit as well.
There are also a bunch of 16mm DDR/Apex 4 wheeler kits that are non splined so they can also be mounted but would require a splined drive face to operate
ALSO Polini stuff may also work for the EVO cranks, as I think these are special 16mm