AMW is right about the Schwintek power top, and they're available at PontoonStuff.com for right at $1K. UTube also has installation videos, and they're not very difficult to install. The hardest part is snaking the wiring through square tubing.
Schwintek's main business is travel trailer, fifth wheel and motor home slider hardware. Schwintek used their resources in this field to apply to the bimini business.
Power tops are very nice, and the aftermarket price is right @ $1K. They're less attractive @ $2K prices, however. I'm tall, and have found it relatively easy to deal with manually putting my top up and down. Tops are easier to deal in some models of Bennington boats than others, however. A double bimini might just be preferred to a single power bimini--at boat manufacturer prices.