I was design the "Easy replacement hotend", It may a little complicated. The link is following:
Recently, I do a new one and it would be useful very well. I share it here and hope that someone can use it in their printers too.
if you want to make it too and can contact me to get more details.
The STL files, they are not need support and just print them directly. Please do not forget clear the support after printting.