I just ordered 12 of these for all my hatches.
http://www.gemlux.com/catalog/hinge-topmount/119609
They are a 1/2 inch smaller than original, but much thicker and stronger.
The only issue you would have would be filling in the old holes and having to make new ones to mount em.
I'm in the process of filling all the little holes a nicks on the boat, so I could justify going with a smaller hinge.
Also had to add some putty to the inserts for hatches up front where the hinges sit in to accommodate the smaller hinge. Had to make em half inch shorter. I just gotta sand em flush and do some touch up gel coat.
I think it'll look good by the time I'm done next week.