A couple of months ago, I bought a pair of
joy-cons joy-pads from this:
nyxigaming.com
I think they are clones from clones, or there are clones from these... Anyway, you might find other brands/names pretty similar to them. I bought from there because of a recommendation on a spanish forum. And I got to say that even if all people were saying good things about them, I am impressed: good build quality, dpad, battery, in-console recharging, gyro, wakeup... I guess their pro controller version might be pretty similar, or even the usage of these joy-pads with the included connector, it's great as a pro controller alternative.