I have not been able to find an extensive collection of RPGs since the Trove shut down. I know there is a torrent backup somewhere but i do not want to mess with that currently. The Eye has some stuff, but it is very limited and the usual Ebook sites also only have a small and very random selection.
make a TTRPG channel, post whatever you’ve got, and do your best to recruit from other places? dbzer0 surely will catch some people but you may have better results with a dedicated channel.