I really think your network is the way to go here. Contact VC funds you've worked with, pitched to, or are otherwise connected with and talk to them about portfolio companies. As someone mentioned, recruiting/headhunting firms are usually on the lookout for executives as well.

Definitely not a needle in a haystack with a bit of networking. I have a similar story (not even as impressive as yours - 2x return to investors on an acquired seed-stage startup) and in 1-2 months of networking have plenty of inbound from Series B companies looking for VP/C-level folks.

This isn’t the most helpful answer but I’ve heard similarly to the sibling comment that most of the search for these roles happens through backchannels. There’s discussion around related topics in the app Blind.

I read it as they sold for 5x their seed valuation, which is typically at least a few million, and is occasionally as high as $15M.