About the Jenvey to 1UZFE intake and Jenvey ITB's. They are available in a lot of sizes: 40, 42, 45, 48, 50,
52 and 54mm as straight bore + 4.5 degree taper and finally custom sizes. They can also be had with
0, 1 or 2 injector ports.
They do cost a bit but I think they are one of the better...