Hi Peter,The Bear Family double CD The Stanley Brothers & The Clinch Mountain Boys '1953-58 and 1959' BCD 15 681 BH has a discography by Gary B. Reid of their Mercury and Blue Ridge recordings and Reid also provides a discography of their Columbia recordings in the booklet to The Stanley Brothers & The Clinch Mountain Boys '1949-52' BCD 15 564. I don't know where you would find a discography of their Starday/King material, but I reckon it would be pretty extensive.
If you are unable to borrow the Bear Family sets from someone, PM me and I will photocopy the Mercury and Columbia discographies for you.
Cheers, Stewie.