5.5" to 3" Transition

[Dave A]

I've made a lot of parts and kits from scratch. I would rather buy a transition instead of making one. Can't seem to find one available.
Any idea who makes them?

 

[lakeroadster]

I've made a lot of parts and kits from scratch. I would rather buy a transition instead of making one. Can't seem to find one available.
Any idea who makes them?

What material?

 

[jmasterj]

You could 3D print one or find someone to do it for you. There's an OpenSCAD transition customizer on thingiverse.