I wonder if I could custom order some rope core, nylon wound strings from a Chinese company. Traditional Chinese instruments often use this type of strings, which combines the brightness and sustain of steel with the soft touch and chunky attack of nylon - truly best of both worlds.
Rope core? You mean like Spirocore strings? Don't traditional strings often come with "sputtered" metal coatings on the outer wrap, instead of using metal wraps? They tend to be for much lower tension too, right?
I guess try it.