Relief!
Speaks for you that you are able to let go of something you put effort into. Kudos!

The one you linked now is a sailfish logo with puremaps marker elements. I know the difference is marginal but look at how beautifull the actual marker looks if it is simply blown up and angled 45 degree

First picture shows the difference of the marker to a sailfish logo. It has an actual tip and a more curved and slightly slimmer body.
Also mind the perfectly balanced spacing and thickness of the rings. The dot in center has the same radius as the thickness of the white and blue element.

In the second we have the original color.
Sure all sailfish icons have a gradient on them. But as we are resembling our direction marker i think we should leave it flat.

Not saying it is not worth to try more and look further. Maybe a gradiant actually does look cool. So svg attached to advance from there.

@rinigus, understood regarding map layer icon. I did not know you where planning to put it on the actual map page. Lets see if i can come up with something until friday.