I recently downloaded some replacement workmate pegs from a design by NeedItMakeIt. But his must be for another variant since it is loose in the holes (I have heard newer ones use 20mm holes, like my version which is a Workmate 425).

That's OK I wanted to make some upgrades/changes anyway. I designed my pegs to sit flush so I can install them from the bottom and it won't come through the top so they can store away cleanly. I hope you find it useful, but if you want to make changes I have included STEP files, and linked below is the native Onshape file.

Onshape: https://cad.onshape.com/documents/353872a962d196c1db520a49/w/ec4dca81b30263918c5f34b7/e/b40d443b930c3ceb68de2b31?renderMode=0&uiState=674a8cb8084d8f2f69139bea