How to Find Promissory Note Investors?

I’m curious if anyone knows where I can find an investor interested in investing their cash via a secured promissory note, where they can earn 5%+ interest vs. a 5yr CD rate @ 1-2%. The life of the note would only be 5-10 years.

Reason I ask…

I’m interested in buying an investment property, but unfortunately, it doesn’t qualify for conventional financing (too many investors in building). I have ~33% of the total cost in cash, but would like to finance the remainder without using a hard money loan.

I’ve heard these investors exist, but never actually gotten a chance to network with them.

Thanks in advance.