I just bought it on amazon and cut to length the pieces I needed. I think I used the 2 1/8th without issue. Pointed the white marking down and toward the block not be seen. Stock clamps won't reach.
https://www.amazon.com/Gates-24034-Coolant-Hose/dp/B000CRBPZU
https://www.oreillyauto.com/detail/b/vulco-3744/agriculture-hd-parts---accessories-19818/fleet---heavy-duty-20088/engine---cooling-systems-20111/hd-truck-straight-coolant-hose---universal-20262/7b3a4340e4b9/gates-vulco-2-1-8-inch-hose/24034/4348422
https://www.amazon.com/Gates-24034-Coolant-Hose/dp/B000CRBPZU
https://www.oreillyauto.com/detail/b/vulco-3744/agriculture-hd-parts---accessories-19818/fleet---heavy-duty-20088/engine---cooling-systems-20111/hd-truck-straight-coolant-hose---universal-20262/7b3a4340e4b9/gates-vulco-2-1-8-inch-hose/24034/4348422