Ah, yes, Riley B. King, once known as the Beale Street Blues Boy (hence, the "B.B." nickname of today), and cousin of Bukka White -- you do inquire about one of the really great blues men still with us.
I'm not sure what you mean by a "quality" recording -- whether you want something with great audio quality, or a great performance, or both. I'm not aware of any of B.B.'s albums that would be classified as "audiophile" quality, but there are a number of fine performances that were recorded. One of the best, for my money, is "Live at the Regal" from 1964. You may also want to check out two compilations of his "greatest hits":
1. His Definitive Greatest Hits, 1999, Ace Records;
2. The RPM Hits, 1951-1957, Ace Records.
Of his very recent works, I also like "Riding With The King" which was a duet album with Eric Clapton that won a Grammy in 2001.