Plastic Pontoon Help

Hi everyone, I'm new to this board and new to boat building in general. I am attempting to build a 2 man boat for pond fishing and I would like to use some small modular plastic pontoons for it. I found exactly what I want to use on this site: http://www.sepond.com/Pondtoon.html
I think the pontoons on that boat would work perfect for what I'm trying to do. However, I can't seem to find any info about them. I've searched this forum and I've googled around and I can't seem to find anything with that small of a diameter or that mounting type. Also the fact that they are modular and can be fitted to any length craft is a big plus. Anyone here recognize these or know where I can get something similar?

Thanks!

 

Anyone?
I'm trying to build something very similar to the one on that website, I just need the dimensions to be different for transport and a few modifications that I have in mind for it.

 

I googled 'plastic pontoons' and found this. They look similar. Sam
http://www.rotonics.com/rivers/mod pontoon/Gullwing-StandardSeries.htm

 

Thanks! If those aren't the exact ones, they are sure close enough. I just tried google again and that site still doesn't come up for me, idk what the deal is. Oh well, thanks!