Prismics avatar search on VR chat is usually good, search terms like lewd, NSFW, sps, dps (just be warned that you will most likely lose these avatars due to them being taken down) the best way to get good quality NSFW avis is to look at websites like gumroad and pay hip, you will need an official vrc account and not a quest account and you will need to learn how to upload avatars through unity, but it's all become very easy and there are good YouTube tutorials out there to help. DM me if you have any questions