Garmin Searching / Waypoint Databases

[Threeracers]

I have a Garmin Zumo and I seem to struggle a bit with the search. A postcode is easy but yesterday I really couldn’t find Portimao Circuit on MapSource – if you don’t get the name just right it doesn’t want to know and yet Google Maps took seconds.

If I find something in Google Earth, is it possible to pull it back as a waypoint into MapSource?

Is there an online resource of waypoint databases?

TIA

Mark