mpc list

[ismaelcavada-max]

https://www.minorplanetcenter.net/iau/MPEph/MPEph.html
This site has been down for days. Is there another site I can use to download asteroids and comets?

[10110111]

I don't know the direct answer to your question, but, FWIW, the website you linked works fine for me (both from Mauritius and via a German VPN).

[gzotti]

Works for me as well (Austria). Any downtime on their side can be expected to be short. These are the master source. You may find data copies elsewhere, but we don't know them either without your search engine.