I'd fire-up Linqpad, load-in a NuGet package for RSS feed parsing, then do something like `SomeRssLib.LoadFrom( "https://last.fm/yourfeed.rss" ).Select( async e => httpClient.GetAsync( "https://google.com/search?q=" + Uri.EscapeDataString( e["track_title"] ) ) ).StringJoin( resultHtml => "some quick-and-dirty-XML-string-concat-here" ).SomePostfixApplyExt( result => File.WriteAllText( "output.rss", result )`.

...something like that?