I went to the Modelfly website. They are still listed there. 'course the website IS in Italian.

http://www.arcmodelfly.it/galleggianti-per-idrovolante

running the description thru the "Google Language tools" translator I get:

Floats for Ready, Cessna 177 and Beaver. We must ask the September attacks specifically for each model.

Our production has reached its climax with the floats. Indeed, the material used does not have problems with the water and is very resistant to impact. The floats are designed for models with engines from 40 or 60 and a weight between 2.8 and 3.8 kg.
The kit contains floats with the basic accessories for the assembly. Apart from the need to order specific set of attacks for each model.
ARC31-Ready; ARC32-Universal; ARC34 - Cessna 177; ARC35-Beaver