PT-Boats UK Release.

[ALTEN]

Looks like this has been released at cdwow.com http://www.cdwow.com/games/PC/PT-BOATS-KNIGHTS-OF-THE-SEA/dp/1340091

[Sonarman]

I think that this is actually the Australian release, CD-WOW tend to import things from all over the place, particularly from the Far East. Although relatively expensive , at the moment I think it is the cheapest option for those in the UK compared to getting it from Australian online retailers. Note that if it is indeed sourced from Oz there may be VAT levied on the parcel when it arrives at your doorstep.