Additional Chargers for the Pioneer?

I did spot a few on eBay that appeared to have the correct plugs by searching for "42 volt charger." I don't want to link to any of them because they ship directly from China and almost certainly haven't actually passed any sort of certification tests, even if they say they have. Normally I wouldn't care about that too much, but these battery systems are notorious for failing in spectacular ways, especially while charging. I want to buy from a reputable seller with a US-based "neck to wring" in case anything does go wrong.

That said, they are all over eBay and Ali Express for those who like to live dangerously.