The outfit on Gunbroker that sells the refurbished Israeli military contract FN Hi Powers still has dozens of them priced between $349 - $449 and up. They use the spelling "High Power" which doesn't always come up in the results when doing a Hi Power search. Sometimes they list them as "FN Browning HP35 9mm pistol" without using the name High Power at all. But most listings do.
The outfit's name is cdisales in Scottsville, Kentucky.
Here's examples of Belgian made FN Hi Powers that they're selling: