From G&G we have a replacement version 2 Gearbox Case for their ETU fitted series of RIFs.
These are Case Only but do include a Tappet Plate as these gearboxes take a subtly altered V2 Tappet Plate.
While this case is listed for G&G ETU Gearboxes, as far as we have been aware, it is a Standard Version 2 Gearbox without propriatry features that make it ETU only.