Fanart (i think?) wallpapers that riot realesed a few years back

So, if anybody could help me I would much appreciate it. I remember a couple years back, Riot released download links for 5 fanart wallpapers (1 for each role, I had downloaded the support one because I was a support main at the time). I'm pretty sure each of them were cupcake themed, for example the support one that I had downloaded had cupcake wards on it. I can't for the life of me seem to find any reference at all to these download links and I really want to find them so I can redownload them on my new computer.