I became really bored with half-a$$ing an adapter from miter saw to shop vac, so I modeled up a quickie in Creo parametric. 

I have not checked complete fitments, but it works with my Ridgid R4222 miter saw and standard-sized shop vacuums.

I printed standing up on the skinny end and 100% infill. The fully thick was result of a couple fails where the print pulled from the bed—fixed.