There are loads of them about in the UK at least....they just don't often come to regular clubs (unless as booked artistes).
A few I can think of offhand over here in UK are:
Gilmore and Roberts
Kris Drever (OK, nearly 40 now)
Flats and Sharps
At the local level, I see a fair number at open mics. Only a week back I heard a 22 year old at an open mic in Devon do a lovely version of "She Moved Through The Fair". I've taken a few along to local folk clubs, but they never stick....a lot of younger people seem more comfortable with the open mic "ambience".