It was the late Marshall Tito
who added -ski endings to Bulgarian surnames in the region of today's FYROM, so as to generate a "macedonian" nationality (distinct from the Bulgarian) to serve his geopolitical priorities. As I understand, most "macedonians" in FYROM whose surname ends with -ski have Bulgarian great-grandparents whose surnames ended with -ev or -ov.
So Kassios, the chances you find a pre-1940s inscription with "Alexandrovski" are practically zero. As good sports, we should be on the outlook for Alexandrevs or Alexandrovs :P