The question is indirectly answered here (with "no"): https://www.digitec.ch/de/s1/QuestionAndAnswer/kann-man-optionale-spitzen-kaufen-33010 The problem is that the relevant Velleman soldering tips are neither sorted as soldering tips nor found in a search for "VTSS4N", partly because the term does not appear in the description at all and partly because spaces are missing. :-(