On the TS 75 Circular Saw, is the protective material inside the Counter Flange and the Clamping Flange available as spare parts and replaceable?

Yes, the Clamping Flange (part number 492217) and the Counter Flange (part number 492216) are available as spare parts however the protective material between the flange and the blade is bonded to the flange and not available as a stand alone spare part.