Release info says there was a UK release. Is there a source for this? I bought this game relatively early as NTSC-US import, and have never seen anything about an official appearance in Europe, which is consistent with common web sources.

It's very likely an error. There are sites claiming a UK release like IGN.

http://www.ign.com/cheats/games/saga-frontier-ps-2114

If there's no physical copies being sold on ebay or amazon uk it most likely doesn't exist.

No source, sent back