It's rare for anyone to go 'the other way' with importing. I suggest a little more reading up than simply 'where to buy'. And you need to give a little more information. Since you're talking about PAL (an antiquated, SD television standard) you're presumably talking about getting the console rather the PC version, which means you may come up against region locking, depending on whether the developer / publisher chose to implement it (since this generation, the hardware developers have made region-locking a little more optional). I'm also unsure whether 'NTSC' have 'PAL' (or modern HD equivilents for those old regions) operating abilities in the same way that PAL TVs typically allow NTSC material to be used (because NTSC > PAL was always in higher demand thanks to europe's market status).
Also, I can't answer these questions, I can just point them out
edit: that said, if you can't wait one lousy month for a title to come out locally, you need to go on Ritalin or something. A one month wait in the UK would be nice for most titles.