Hello Arro, and yes that's quite surprising, though in a sense, even exercises are 'pieces of music', but you might want to look at some of the scores with the forum collections, and perhaps ask for suggestions from members in a separate post, relating to your point with the Sagreras (which I'm not familiar with I'm afraid).
And its easy to build up those posts to get to 020 as Geoff mentioned, just listening to members' recordings and offering views will do that quite quickly, and also build up some of your awareness of how the playing thing works.
Simon Ambridge Series 40 (2005)
Trevor Semple Series 88 (1992)
Louis Panormo (1838)
Alexander Batov Baroque Guitar (2013)