Ask HN: Foreigner Health Insurance

I recently moved back to the US, this time on an O1 visa. I'm the cofounder of a startup, bootstrapping, living as frugally as possible. Something I'm having a hard time finding is information on a sensible personal health insurance plan for non-resident/non-citizens. Previously I rode out my student health insurance plan from school. Our company (my "employer") is too small to have a corporate insurance plan that I can get on. I have neither parents (in America) nor dependents. I'm a fairly healthy and fit 26-year-old male with no foreseeable medical issues. I have a somewhat flexible budget, but basically I want to make sure I'm covered for emergency dental and medical at the most reasonable cost.

Obamacare and other standard health insurance quote sites, besides being spammy as hell once I give them my phone number or email, do not address non-residents at all.

Does anyone have experience in this? A place where I can look for relevant information?