I agree - DPH are good - but beware of needlessly buying a complete set of 5 hoses.
Check the DPH website direct as well as eBay.
I only fitted the set of 3 from the intercooler to the intake ducting/EGR.
The long 'S' pipe from the turbo to the intercooler doesn't seem so prone to failure.
The top ones were porous and splitting at 86K - but the 'S' pipe is still good at 110K
The fresh-air intake in heavy-duty 6mm thick silicone is way over the top for me - there is no pressure in that hose - so a lighter weight silicone hose is much better suited to that position and is much cheaper.
Try this one - enough for 2 - share with a friend!
If you don't want to pay for silicon why don't you just fit standard replacements, they aren't dear and will last for several years & many 10K's of miles?