Contact gibson with the model AC and they might be able to fix you up since they offer this as an option on there boats. Or you can make some nice tables with pvc pipe and smoked plexiglass. I made 2 for my old nautaline and they worked out just fine. even made a set for my fathers nautaline(that was 5 years ago) and they still look god and work just fine. Cost to build each was about $50.00 which is cheaper than the tops you are looking for and you wont need to pull up the ac to mount the base plate like the ones gibson uses.
1999, 52' Monticello - Miller Tyme
Port of Aurora IN