I am, too.
Boogie Woogie Blues--Charline Arthur (1950)
Wah Hoo--Bill Boyd & His Cowboy Ramblers (1936)
Kangaroo Blues--Cliff Bruner & His Texas Wanderers (1938)
Dust--Roy Rogers & the Sons of the Pioneers (1938)
It is rather interesting that the best archive for real AMERICAN country music is in Britain.
http://country-music-archive.com/