Here's a great source for washboards: Columbus Washboard Co.
Here's one of my favorite Washboard Sam songs:
I'm Gonna Keep My Hair Parted – Washboard Sam
Worried now, Won't be Worried Long
Don't believe I'm eaving count the days I'm gone
Chours:
Hair parted in the middle is the only thing I crave
Hair parted in the middle is the only thing I crave
Gonna keep my hair parted, til it take me to my grave
I got a gal lives down by the jail
She got crazy things hangin up for sale
Goin up on the mountain look down in the sea
Creatures and the crabs doin the wee wee wee
Me and my baby we bought a Ford
Now we shift the gears on the running board
Standin on the corner 25th and Main
I heard a blind man call out your name