Where to find shp2pgsql windows binaries?

Answering to my own question based on help from @Sunil and @Paul.

Shp2pgsql.exe is available in binary download from http://download.osgeo.org/postgis/windows. It comes with a lot of unnecessary files. Only libiconv-2.dll in needed.

To be able to load shapes to PostGIS also the psql.exe is needed. It comes with pgAdmin installation. It depends on libpq.dll, libintl.dll and ssleay32.dll.

Not sure how long it's been available, but if you download the ZIP bundle from the link above, it contains a GUI for the Shapefile <--> PostGIS import/export in \bin\postgisgui.

Works like a charm, and no installation required!