What songs?
Dave Ice has a nice arrangement of Stairway To Heaven for Pedal Harp. I have been working on my own arrangement of it as well. There is one out there somewhere for Lever harp someone might have.
There is a great arrangement available through Sylvia Woods Harp Center of Coldplay’s Clocks which seems to be one of the most popular pop pieces played by harpists. Almost everyone I know who does Pop music plays that one.
Sylvia Woods has books of Beatles Songs and a book of music from the 60’s that includes some nice pieces like Downtown, Windy, and Let’s Get Together and some other 60’s classics.
I mostly just slightly modify piano music in a pinch, or play from fake books.
So what songs specifically are you thinking about?