Yes, there’s ways to retrieve the certificate file (only the certificate, not your private key)…
You could do so with crt.sh or retrieve the certificate from CT logs.
If you got rate limited, the only way is to wait until it expires… However, you are rate limited only with the two exact hostname. You could bypass the limit with another hostname be(maybe a random one)…
The best possibilities for you to obtain a certificate that only contains that exact two hostname is Nov 25th 2018.
Please read the rate limit documentation below:
I also see that you have a Digicert certificate issued, is there a reason that you choose to use let’s encrypt certificate instead? (Because you seems to paid for it, since it’s a one year certificate)
I originally paid for the ssl before I learned about letsencrypt. Still fresh at all of this, but I managed to install the certificate files that I paid for so it’s all good for now. But would like to start using the advantage of letsencrypt and the auto renew since why pay for ssl when you can get it free, right? hehe.