I specifically made all these inserts for my table saw which is an Axminster 2552B. They may well fit other table saws though and I've included the Fusion 360 file so that you should be able to modify the model to suit your needs.
The reason I made my own insert was because the one supplied was too thin. Axminster sent me another but it was the same.
All the designs are made very slightly too high so that you can sand them down to suit your specific saw.
The file names should speak for themselves, wide slot in the middle, narrow in the middle and narrow offset which suited my specfic saw.
In my saw's table the insert needed lightly sanding around the rim to fit. The plastic lugs can break off very easily with them being small but they aren't really needed (in my case at least).
Obviously this is a very specific use model. I doubt many people will download but hopefully it will help someone out there!
The author marked this model as their own original creation.