I went to home depot and on the electrical aisle, they had a hollow steel pole that fit perfectly inside the bimini posts. The pole was 10 feet long for $1.97.

I stuck it in the lower part of my bimini post and marked it and then inserted it the top part and took a measurement. Cut it so that it fit with just a little bit of extra room (did not want it moving up and down inside).

Slid it in the upper portion and then slid the lower part of my bimini up and re-assembled. I used two little allen screws in the middle hinge to secure the hinge to the bimini upright as the old hinge had a rivet that had broken off with the post snapped. I think the rivet through the white hinge and into the post is what weakened the post and the jarring from the water let it break.
Still have plenty left over to fix the other side when it breaks. Cannot go wrong with a $2 part and 10 minutes of time to fix.
P.S. the black tube is my dive and sporting flag holder. They won't stay put in the transom light. Not the nicest looking, but serves the job till I come up with another idea.
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2010 Sea Hunt Triton 220 "Big Whiskey"2003 FW Freedom 180 Volvo Penta 4.3GL/SX-M "It'll Do Four Now" (Sold)
2012 Avalanche LTZ 4X4 