Seeking Sources for Private Sector RFPs and Projects

Hey all, I am trying to identify private sector RFP's and I am aware of multiple third parties who source RFP's, RFI's etc for the public sector, but have been unsuccessful at finding sources for non public RFP's and projects. Curious if anyone here is aware of such providers. If you are aware of any or have had luck with sourcing these, please DM me. Thanks all!