Since this thread is about discs, and they are starting to disappear from amazon and ebay, I wanted to post the following link as a bump.
https://forums.thesims.com/en_US/discussion/683314/pegi-esrb
I can vouch for the this. I ordered a US version of, dare I admit, the KPST stuff pack and was shipped a UK version. After finding the link, I took the plunge and the disc installed without any issues.
As an aside, Barnicle Bay codes are available on ebay for about $8. Register codes on store site and download from purchase history.
Happy hunting.
