[R4513 table saw dust port]

Here’s what I found that works across both my table saw and miter station. 
 

P1059-150 - www.fernco.com have worked great (1.5 x1.5”) they are flexible and measured as an inside diameter, and fit very snug to the exhaust port (over the top) I used a little oil to help slide it on

 

found it at Lowe’s 

 

for some reason I can’t post a picture 

 

Flexible couplings