Module is available as a DIY project only.
This Module is currently available.
System-100 Model-102 inverter
Clone of the System-100 Model-102 under-the-hood inverter circuit.
In fact, 2 of them with the addition of a 3x4 multiple.
https://www.pharmasonic.jp/shop/index.php?id_category=23&controller=category
These merchants probably sell this module. Huh?