How to approach/find people who can find me new clients for a finder's fee?

I don't have the funds to hire a full time sales person since I'm a one-man start up. However, I am open to offering a high percentage of the billable income as a finder's fee for folks who connect me with new clients (I'm aiming for each client to net me between $5k-$8k).

The target audience would be mid to large organizations looking to train their people on a specific niche skillset.

Should I just be networking my tail off? Or is there an outlet for finding this specific type of person?