Try ebay or scrap yard. Can also google scrapyards that will give you quotes on parts you need and post to you. One the easiest ways is get bottle of water (bottle like fabric deodoriser) get someone rev your car why its on an squirt small amounts of water carefully across the pipe. You will see bubbles on where the air is coming out. If lucky maybe just be a loose hose instead of a slit in the hose.

while the engine is cold because if its hot the water will just evaporate

Just a trick I got told. Would imagine cold due to working near a hot engine is asking for trouble.

Ive tried ebay and ive put a request in on breaker link for the part ( pipe 1 ) but as yet no replies or quotes. Will have to try the water method but only trouble is pipe 1 goes behind the front bumper and into the intercooler...so may be tricky.

May have take front bumper of first then. Their is a guide for it

You tried these on ebay?

Item: 291360278501 (used but petrol one) and item 381192061697 (custom made, says petrol but also states they are made to order. May be able do diesel one if got diesel car)

Also click on first post ebay link to that hose. An you can always message the person to see if can make one you need ;-)