My disability benefit, turned into my SS benefit when I reached full retirement.
Can I reclaim a new benefit based on my ex wife’s numbers ? It would be substantially more !

Hi. You can't stop drawing your own benefits and collect divorced spousal or survivor benefits instead, but you could apply for an excess divorced spousal or survivor benefit to be paid in addition to your own benefit.

There's not enough information in your question for me to know if you'd meet the requirements for those benefits, though. The requirements for divorced spousal benefits are outlined in the following section of Social Security's handbook: https://www.ssa.gov/OP_Home/handbook/handbook.03/handbook-0311.html. If your ex-spouse is deceased, you can find the requirements for survivor benefits in the following reference: https://www.ssa.gov/OP_Home/handbook/handbook.04/handbook-0403.html.

Best, Jerry