There are certainly examples of where spouses D and then get back together and even re-marry.
There are two other forums on this board for those who are D and are still working on themselves and supporting others in the same sitch called "Divorced but not done" and "Surviving the big D". Perhaps starting a topic in one of those might be helpful.
I am sure you still have feelings for your X and I'm sure that the holiday season is bringing those feelings to your mind.
If there is enough contact with your X, then simply DBing by showing your best to him (which is hopefully not an act, but consistent and real) will have him curious with you and perhaps peak his interest.
As with DB, though... I would suspect that any pursuing may not be the best idea. Trying to be attractive is different than being attractive by being a great person yourself.
