No there is no way to prevent them to get the list because a list of tor nodes is public https://torstatus.rueckgr.at/
For using homepages that block tor, those are mostly using https anyways so the traffic is at least encrypted.
You could youse a cheap VPN like Cyberghost for visiting those urls although also VPN providers get blocked for some urls because of Bots/spam/abuse.
You could also use a normal proxy for those urls but ofc then there is no encryption.
Anyways i think most of the tor blocking homepages are using https impov.
If they don't get a VPN for security.