I found this stuff on Amazon. I’ll try it out and report back.

Beduan 8 mm OD Pneumatic Air Line Tubing Nylon Air Hose for Fluid Transfer or Air Brake System 32.8ft (Clear)

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles