Googling around I found this https://www.amazon.com/TROND-Extender-PD-Splitter-Expander/dp/B085DP9FFS and this https://www.homedepot.com/p/3-Prong-Outlet-Extender-with-2-Type-A-USB-Wall-Charger-Plug-Adapter-White-2-Pack-EA03AA0-0102/322178933 , but I'm not sure either of those is really what you're looking for. Any reason you need 3-prong?
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