I'm hosted with site5. They say that they have helped their customers install LetsEncrypt certificates, and so far I have got to the point where they have created a CSR for one of my domains.
I've looked at that page but cannot see anything there that would seem helpful. I wonder if anyone here can help me nudge this on a bit more. I'm more-or-less determined to test site5's assertion that they're able and willing to help a customer use LetsEncrypt.