I really love his music, so I want to share some of my favourite songs. You can find English lyrics for some of these on lyricstranslate.com
La URSS volverá (The USSR will return)
No Pasarán (They will not pass) (cw dead bodies in video)
Bonus Video: Los Borbones son unos Ladrones (The Spanish Royal Family are Thieves)
Sorry I dont know. Just now I found this website which seems to have all his music and you can listen for free, but the download button isnt working for me. Maybe you have more luck.
https://www.hhgroups.com/artistas/pablo-hasel/