2" suction hose is usually used by the truck mount carpet cleaner owners and less commonly, those with high end portable machines.
Is this the type of hose you looing for?
If so, there are plenty of suppliers about but different quality.
I like the quality of the suction hose from Solutions UK. It is fairly light, importantly flexible, and has a smooth bore (less turbulance - less foaming).
Other stuff I have is more rigid so more difficult to coil.