P.C Version only available to Europe and U.K. You can't find it anywhere out.
If you want to order P.C Version for PES2011. You can go to Zavvi.com for the lowest price. It will be shipped by U.K Provider, and it will take about 2 to 3 weeks before it is arrived.
P/S: You can also play online against people in U.K server through P.C version, however it will be lagging a little bit.