Sports Virtual Studio Set by 333pix on CGguy
https://elements.envato.com/sports-virtual-studio-set-VM63QGL
Free 
News Virtual Studio Set by 333pix on CGguy
https://elements.envato.com/news-virtual-studio-set-VDTHBQS
Free 
Black Mamba (Broadcast Pack) by Dyomin on CGguy
https://elements.envato.com/black-mamba-broadcast-pack-V7J8FXB
Free