You can use 3/8” oil cooler hose. I have 100s of feet of it if your local parts store is out.
The clamps are: 90080-46355 and I have just a handful.
On the 3FE the high pressure hose assembly MIGHT come with the lower pressure as well since from factory it’s one unit. But I can’t really verify.
Gates is fine. On the 1FZ the Rein is a near identical replacement despite being made in China. The Gates one has a 180° bend that doesn’t fit perfect. Either way it’s a hydraulic hose. It’ll either fail right away or not for 200k miles.