Well here it is. I finally got off my arse and did it.
I bought two matching LF Omega boards because I loved those designs. One was $60 used on EBAY, and another was $80 new on Ebay. The used one was in great shape though. The frame is made by Body Glove of all companies. I want to say it was around $100 for that. The strange part is it didn't come with the hardware like I thought it would. That wasn't actually that big of a deal. I just had to go to the store and buys some nuts, bolts, and washers.
The frame is squared, and not tubes, so it created a strange problem when I was about to drill the holes into the board. The board is obviously curved, and when put on top of the two frames, it doesn't sit flush. The whole thing was pretty wobbly when I first tried to mount the seat board and drill. To fix that, I got silicone and lined the inner edge of the frame before laying the base board on it. I let that sit and it became stable enough to drill the holes. After that everything worked out perfectly.
I've seen a few of the benches done on here before, and I'm pretty proud of how this turned out. The frame made by Body Glove was a huge surprise but that was for sure the right way of doing this. Now nothing beats the swing bench that Dave has with cupholders and all, but this turned out pretty darn good I think. Here are some pics.