Public radio stations shopping for a plug-and-play jazz stream now have double the options to consider, with two newcomers to the field offering mainstream jazz services. Last month KPLU in Seattle/Tacoma announced that it will soon offer its Jazz24 stream, which it now broadcasts online and locally on an HD channel, to stations around the country. KPLU says the channel now draws a monthly web audience of 100,000 listeners, 90 percent outside the Seattle area. Meanwhile, some former hosts and creators of JazzWorks, a service that changed hands in May along with Pittsburgh’s WDUQ-FM, are now offering a jazz service under the name of Pubradio Network, competing with their old channel. Add those to the incumbents — JazzWorks, now operated by WDUQ’s buyer, Essential Public Media, and the Jazz Satellite Network from Chicago’s WFMT.