Great suggestion Markus.
Silicone hose in the larger diameters for connection to a pcv tends to collapse when warm and under high vacuum at idle.Bends will kink. For that reason it will fail the Smog Test here if a tech sees the vivid color of aftermarket silicone hose.
You are correct, here is a fiber wall reinforced version but that helps with pressure ,not vacuum.
One solution may be to select thick wall/heavy wall silicone.It is so much easier to work with than the stock "plastic". I found some with a 3mm i.d. and 8mm o.d. Turbosmart TS-HV0303-BK
3m Pack-6mm Vacuum Tube Reinforced - Black
Normal wall thickness would be 1.5mm.This item is 2.5mm.Should help??
One complication is that silicone is very elastic so you usually buy it 1mm smaller i.d. than the 'plastic' OEM style tube.
Note that the silicone hose manufacturers seldom specify a wall thickness and tend to use hyperbole like "turbo" ,'platinum cured' ,so it can be difficult to find a truly premium product.
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