Looks like everybody uses the same radar that's in Iceland. Wikipedia lists 28 nations using the FPS117 radar. (The main radar for the Peace Shield system, but it integrates other radars from army and navy air defense sites).
The version 5 was in Iceland when I was the Materiel Controller at the 932nd ACS back in the day. They had the version 4 in Alaska so lateral support was easy; if we didn't have the part, nobody did.