The Open Source Lab at OSU is a really amazing resource. They host VMs and mirroring for the Plan 9 Foundation, which I'm involved in, but also dozens and dozens of other projects.
They're also facing a major budget deficit and are at risk of closing.
https://osuosl.org/blog/osl-future/
On the off chance you're connected to anyone (or are someone) who influences large-scale corporate giving, you should encourage them to consider sponsoring the OSL. I'm happy to talk more about them if it'd help.