Looking for a Pre-Built LLM RAG (Retrieval-Augmented Generation) Project

I am looking for a pre-built LLM RAG (Retrieval-Augmented Generation) solution that is ready to deploy or requires minimal customization. The project should be capable of retrieving real-time or external knowledge and enhancing LLM-generated responses.

Budget: Open to reasonable offers based on project quality and features
Timeline: ASAP (preferably a ready-to-use solution)

If you have a working LLM RAG project with source code & deployment instructions, please send details, or demo links