Help finding an advert plugin

Hello

I mistakenly posted this in the .com forum and got my head bitten off, chewed up and spat out. Hopefully I’ll have more luck here, in the better of the two!

I am rebuilding a website for a client and they occasionally allow artists and bands to “takeover” their entire site for a set period of time. When they do, all banners point to the artist site, all news articles are about them etc.

I was wondering if there were any plugins which would allow me to use the dead space around the edge of the site (as per the https://www.imdb.com site) to have another advert for that artist/band to use?

I dont care about any other functions and wont be joining any advert platforms, its just for the takeover artists to use to point to their own site/record label etc.

Does this exist? Can anyone point me in the right direction?

Thanks

Ian