Welcome to the forum

Yes finding these air tubes are next to impossible now.

You can make your own, and not too expensive, and in any color you want, lol

Google: fiberglass casting tape

Yes the stuff they use on broken arms

You can use it to repair broken air tubes, or to build them from scratch

Google: fiberglass casting tape for air intakes

Some videos out there

And Google: how to make carbon fiber intake tube


You can also carve styrofoam in to the shape you want, i.e. a tube with bends, then layer it in cast tape, then use acetone to dissolve the foam, or cut cast off and remove foam

 

oh sweet, great advice!