Also, if you don't have someone at your company with a network & social cachet to pull in the talent you need, you might need to start there. If you don't have an in-house recruiter, bring one on to spend their time managing your proactive outreach. Giving up the equity/cash required to attract a Director/CTO may be a harder pill to swallow, but you need someone whose job it is to be trying things out & experimenting with what works at your company.

In this market, you can't expect that talent will come to you.