Well I am pretty confident that they will sell a hardened nozzle soon, like I was confident before that they will make a CHT for bambu lab clone hotend, this is only a question of weeks or couple of months, please dont forget to post a link when they will do that 
Tempted to try with the larger nozzles and spin them up in my lathe or mill to get the head reduced to fit.
Not convinced that this will work as well as current clone that are fully inside the heated block, but who know…