Slingshot models M113 rubber band tracks available recently?

I am asking for a friend: He is interested in the “Slingshot models” M113 Rubber band tracks which they released 5 years ago (“Soucy Tracks”) for a danish M113G4. He tried to contact them, but with no answer until now. Did someone order from them recently or is aware if they are still producing this set? Their homepage looks a little outdated…

Thank you, Andreas