just get a bit of silicone hose off ebay, but you might have to put up with one end being too tight and one being too loose, i had the same problem so i just squeezed one end on, the intercooler end and used two different size clamps, you will have to use non braided so that it can stretch, i was expecting mine to split but after a year its still hanging on in there, and i just haven't got around to putting on a better option, will probably just leave it until i get better piping and just get a fitting welled on to suit the purpose, i you are still running the stock ECU i would not block it off as its controlling your idle