Oil Breather hose (2.4E engine)

[Robster]

Hi experts, doing a bit of 'spring cleaning' on my engine (2.4E in 914-6) and realised the oil breather hoses are past it. These are..

1. Oil filler neck breather hose to airbox.
2. Crank case breather hose to Oil tank.

Rubber hose with external braided cloth outer. Looks to be approx. 20mm inside diam?

I can't seem to find anything on the web (well nothing within the realms of common sense £ money..)
can anyone advise a source for these hoses or who may sell the correct diameter by the metre?

many thanks