https://tmafe.com/
This site seems to have almost all the software you listed, giant packs of MSAgent characters, and even an upload page for people to upload characters.
Note though, that it has a 'products' page, which lists software already listed on its 'downloads' page, but the only 'products' listed are those from the creator of BonziBuddy, including a new version of BonziBuddy itself.
I've not checked any of it for malware, though I plan to before I attempt to use any of it.. by my internet senses tell me this is too narrow a scope for an attacker to invest time in.
The BonziBuddy site also features a patch that it claims will allow MSAgent to work on newer Windows versions up through 24H2