I purchased the Anco 52-16 blades from another member here (thanks Paul!) and while I was able to make them work for my 228, they were not a direct replacement. The rubber part of the blades are quite wider than the existing DFI blades that were on there. But my existing blades have a slide on attachment to the wiper arm, and that slide on connector was riveted to the blade body frame. Also, that attachment point of the blade assembly is much wider than the Anco blades.
In order to make them work, I had to drill out the rivet that held on the slide on connector, and used small stainless bolt (with a nylock nut) and two small stainless nuts as spacers to attach the slide on attachment to the new blade assembly.
Not hard..but not a "bolt in".