Thanks for the help, Nigel! I appreciate it!

The SeaCommander floats look like great quality, but I am afraid they are too heavy for an electric floatplane of the 62" size.
I would need the smallest ones which are still 10 oz. (each float, I guess).

The built up wooden ones might be the way to go, but only if they offer the correct size and if they are lighter.

Does anybody know of scale (or semi-scale) plans or drawings that could help me to build the floats myself?

Matt