you nee to take measurements of the pieces you need. inside diameter, length and angle of each bend, also whteher or not its increasing or decreasing in diameter.
then once you know the exact size and shape of the silicone pieces you need go online to www.siliconeintakes.com
and order the pieces you need. they make them in any size and shape so you can get exactly what you need. You just have to tell them what exactly it is you need. they will make it. done.