@tuomaspap Sorry for the delay, I never expected a reply. I was able to get it through the wayback machine. I've gone ahead and found a link on github for the pi4, hope it works!
https://github.com/RetroPie/RetroPie-Setup/releases/download/4.6/retropie-buster-4.6-rpi4.img.gz
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first