I get all my constant tension spring clamps from Mc-Master carr supply.
when I buy a new vehicle that will see alot of miles the first thing I do is replace the factory spring clamps with the constant tension clamps. their pricey but cheaper than a tow when the truck pukes all the coolant out on the highway when a spring clamp fails.
And any intercooler piping gets them on every connection.
The Japanese-style spring clamps are actually decent if not a PITA to pull. I prefer German-made Gema or Norma clamps that are OEM on Mercedes/BMW/VW.
And I believe Goodyear's Hi-Miler blues are the same as their heavy duty blue heater hose I tried to get my hands on from a truck parts house. I prefer Gates nowadays.