Tb is about 71mm. 70mm (2" 3/4) is a standard size but 76mm (3") is cheaper and more common.
So my idea for a cheap induction kit is
a 76/70 reducer. ?6
then a stainless bend, not alloy so I can Tig weld a "T" in for the idle ?12
Options then are more pipe work to the inner wing with a quality open cone filter or a budget induction kit. ?45
Did you see the post on the guys that had the ITG style hose made by PSH ?
I was going to give them a ring today, they may be more interested if they are making up a batch instead of one