Soul City Issues Vintage Johnny Rivers Sets     HIGH TIDE FOR RIVERS:  Back in the early ‘60’s, Johnny Rivers was the king of the Sunset Strip: The singer/guitarist’s 1964 Imperial album “Johnny Rivers At The Wisky A Go Go,” which spun off his successful gigs at the West Hollywood nightclub, climbed to No. 12 on Billboard’s album chart, while its single, a chugging remake of Chuck Berry’s “Memphis,”  rocketed to No. 2 on the Hot 100 Singles chart.  We always found Rivers’ razor-sharp voice and hard-rocking, blues-based delivery hard to resist.  In 1966, Rivers founded his own label, Soul City Records. The musician has now resuscitated the company in a big way: Moving exclusively through Distribution North America in Woodland, Calif., the label has just issued “Greatest Hits,” a package of Rivers’ best-known chart-toppers, and “The Memphis Sun Recordings,” a set cut at Sun Studios with the late Carl Perkins sitting in on guitar. Sun Records maestro Sam Phillips contributed liner notes to the latter collection.  Soul City has also released Rivers’ first new album in 15 years, “Last Train To Memphis.”  It’s an R&B and country-inflected effort that features contributions by guitarist Waddy Wachtel and Dean Parks, covers of classics by bluesmen Muddy Waters, Jimmy Rogers, and Bobby Bland, and material co-written by noted L.A. songsmith Jack Tempchin.  The label is taking a single, “Down At The House Of Blues,” to AC radio on April 1.  Soul City, which is headed up by VP/GM Rebekah Alperin, has also licensed Rivers’ best-selling album, the No. 5 1968 Liberty release “Realization,” from EMI/Capitol.  Soul City will reissue the set in late June.