Soaring is currently making the switch, not only as sustainers, but also for starting. There are models from major manufacturers, like the Schleicher AS 33/34 me [1] or Antares [2].

[1] https://www.alexander-schleicher.de/en/flugzeuge/as-34-me/

[2] https://www.lange-aviation.com/antares-serie/antares-21e/