Does anyone know which battery grip is actually worth getting for the Lumix G9II because I'm seeing conflicting info online about whether the older G9 grips fit or if I absolutely have to shell out for the new DMW-BG1?

I’ve been shooting with Panasonic for like eight years now and I finally upgraded from my original G9 but man I didn't realize they changed the body shape just enough to make my old accessories useless. It’s super frustrating because I have a huge wedding shoot coming up in Seattle in less than two weeks and I really need that extra battery life and the vertical shutter button for those long portrait sessions. I looked at the official one but it's like $350 which is insane after what I just spent on the body and some new glass.

I saw some third-party stuff on Amazon but I'm terrified they're gonna fry my electronics or the weather sealing won't hold up in the rain. I need it to handle:

• full weather sealing for outdoor shoots
• consistent power delivery without weird shutdowns
• working joystick for focus point selection

Does the G9II even recognize the non-OEM batteries if they're in a third-party grip? I really need something reliable that wont fail on me mid-ceremony but my budget is basically tapped out. Is there a specific brand like Neewer or something that actually works or am I just stuck buying the overpriced official one...