I also needed cockpit seating (for a 22' Angler) and I went a different route. I got two white Igloo 120 quart coolers, and covered the tops with padded self-adhesive boat flooring. The padded flooring gives a softer surface to sit on, and your butt (or a cushion) won't slide off of it. I put more flooring on the bottoms so they stay put on the cockpit floor.
The height and depth are actually pretty good for seating, and the gunwales behind you give a pretty comfortable 'slouch' angle as the backrest. If I have passengers, I use the v-berth bolster pillows as back cushions. They'll seat 1-2 people each, and they leave plenty of room in the cockpit for standing/fishing/whatever. They might be a little long for the shorter Cruiser cockpit, but there are shorter coolers out there.
They also give you a ton of extra storage space, and they're narrow enough that you can stack them in the pilot house and lock them up while you're away.