Pre existing ?

I know some group insurance covers that. Business group insurance works differently but they require a minimal head count of at least 12 people in group.

There is no underwriting requirement if the group is large enough

Each state has different laws governing the insurance carriers in each state. That being said, it is likely that you can get a small group plan, and your pre-existing conditions would be covered immediately because you can prove continuous coverage, (employers plan.) Most likely you would not need to be incorporated, and would not need to purchase COBRA coverage if your effective date on the small group plan dove-tailed with your last day of employment.
That’s the good news. The bad news is that, in general, group insurance rates are about double that of an individual plan. If at all possible to obtain an individual/family plan, (even with a waiver or two,) I would consider this. If your pre-existing conditions are not too serious or expensive to maintain, it may well be worthwhile to purchase an HSA, (Health Savings Account,) qualified plan, paying for any medications/office visits with pre-tax dollars.

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