Thread: Eccentric over barrel rifle suppressors - anyone know?

Just picking brains... does anyone know of a manufacturer of an eccentric, ideally over-barrel suppressors for .30 rifles such as .308 or .303?

I know Hiram Maxim made one at the dawn of time for his machine guns, the steel spiral baffles of which were later copied in the de Lisle .45, but uncle Google does not help further ("Eccentric suppressor" search just gets you up Osprey, a manufacturer that makes eccentric pistol suppressors).