yes, loooong time ago indeed, seems proper adapters are getting harder to getlooks like the SUNIX adapters on amazon are out of stock
Try to contact the seller (Vention Technology) and ask why the CGMHA is unavaible.
Also ask if they can sell the CMFHB which is the new HDMI 2.0+VGA model with the new Lontium chipset.
Eventually try to search for CGMHA or LT8711X-B, you will probably find adapters with a different name (Festnight,Docooler,ecc..) but it's the same adapter from Vention.
Vention replied, as for about CGMHA availability, they answer was that "they dont have stock now" nothing more
as for if they can sell the CMFHB which is the new HDMI 2.0+VGA model with the new Lontium chipsetm their answer is: "Sorry for replying late.The chip of this hub is LT8712X.And the HDMI port support 2.0.But we have no stock of it now".
also they left a link to their store in aliexpress https://vention.aliexpress.com/store/536610?spm=a2g0o.detail.1000061.1.5cf87760d7dWZi