NO chance at all. None. Zip. Sometimes you just have to face the facts! lol O.k., I'm kidding.
I think Rush Limbaugh said it best, life begins at age 40. By age 40, you know who you are, and you are probably not gonna change to much at this age from a personality perspective. Also, you probably a little better off financially speaking, than compared to where you were at in your 20's.
The bigger question is, why do want a partner? You have gotten this far without one, so why risk your financial, emotional, and mental well being for a sake of a relationship? Marriage has about 50% divorce rate, when woman typically start 80% of the divorces. Things to think about.
One last bit, if you do start a relationship with a woman in her child bearing age, she will most likely want to start a family, so I hope you are ready to have far less personal time, freedom, and disposable money, if that is the case.
With all that said, the best of luck to you in your que$t of a partner.