First learn how to spell Colombia. Spelling it with a "u" is wrong, and makes some people reading this very unhappy.
You can, of course, try to walk the "gap", but that is not recommended at this time. There is only one other way I can think of: Contact private yachts in either Pan. City, or Colon, and if you're lucky they will go somewhere in South America after having gone through the canal. Trying to hitch a ride on one of the small contrabandistas is dicey. If you're caught with the baddies, you'll have a lot of explaining to do. And seeing that you'll be travelling with a lady, I wouldn't risk it.
If you're still in Ottawa, give me a call. I'm a local boy, and only recently came back from ColOmbia.
Best of luck.