Where is LOCAL? I would suggest Stokley's Marine. They have a good base that you would put in a bass boat. Drill a hole about 2 inches wide 4 inches deep and bolt it down. If the bench seat is hollow you might need to reinforce the bench on the underneath so when you lean on it, it wont tear out. I did this on my old jon boat a few years ago and it worked well. Another idea is to build in a casting deck. Mine was from front of boat to the first seat back. Simply build Ribs or (Stringers) and then lay on the deck (1/2" marine plywood). Seal all wood with a good marine sealer and it will hold up just fine.