I lucked into a remote job. Applied thinking it was an in-office position..

Anyway, have you talked to recruiters? As much hate as they get on here, they can be very useful. A great recruiter will know your needs as well as the company's, and can give you an idea of a position's flexibility. In my opinion it doesn't hurt to reach out. Worst case scenario, you end up with some extra emails in your inbox every week.