I replace mine during my restoration, I reuse the existing U, for the backing plate I bent two 1/4" aluminum plates drill two holes and install it.
Before I re-install it I use mat and resin about four layers on the inside to solidify the integrity of the area because it appear to be very weak for whatever reason.
For a better U hook or eyelid whatever the nautical name is you can use this also better spread on the outside as shown.
http://www.ebay.com/itm/ws/eBayISAPI...ectorid=229466