10-01-2020, 09:17 AM
After trying one motorfactors and not finding they had 42mm ID, I found that these were cheapest online for a metre, allowing three 12" standard hoses for just over 7 quid each posted.
https://www.ebay.co.uk/itm/121566039349
https://www.ebay.co.uk/itm/121566039349