I scanned all disks, I've only seen "Bravo Romeo Delta" (a 1992 game) and a Romeo Knight music disk. But the site has a pointer editor, did it look like this?

https://heckmeck.de/pointers/?user-content=00000000000000000...

I've also scanned all "tiny" cursors with 13 pixels or less. Surprisingly, there is no pointer with this exact shape yet!