Tales of Symphonia Chronicles, PS3 – £11.87
First, purchase $20 PSN credit from Amazon US. To purchase digital goods from Amazon US, use your UK Amazon account, and add a US billing address to your account. This address needs to be a valid US address, but nothing will be sent there. Some card issuers may charge a fee.
Then using a US PSN account, activate the credit, and use it to buy Tales of Symphonia Chronicles off the US Playstation Store for $19.99.