Looks to be available as an option. If you build a new 185 Competitor Sport (windshield) on Alumacraft's website, under Accessories/Aft Deck Options it says:
[h=3]FLIP UP BENCH SEAT GREY CARPET[/h]This accessory is a great way to add both extra seating as well as and extended aft fishing platform to you boat
22990021765 - ACCY, FUBS, GRAY, CARPET (C175-205)