Yes Rita Leydon has been "instrumental" in the American Nyckelharpa Association, and has documented many "'harpa" players and builders as well as other Swedish topics of note such as lacemaking.. with many
videos

she also has a recording company called RPM together with Peter
"Puma" Hedlund

http://www.ritaleydon.com/ZrpmMusic/rpm.html with several titles
availalble.