I don't know. Does he have garnishable income?
Regardless, it is a really bad idea to depend on an ex for health insurance or income. You should really try to get your own job w your own health insurance. He could be hit by a truck tomorrow and unable to provide Cobra. I've paid Cobra, for a VERY short term, and the cost is RIDICULOUS. Paying it was great incentive to secure a benefits providing job.