Any cydia App for choosing specific proxy country?
This is a non-Cydia solution. I hope it still applies as answer for your question though.

Maybe you would like to try an app called VyprVPN. It lets you choose your server location basically with a single button. It advertises on its Website as a "security measure", but this review states


  VyprVPN can be used to bypass website restrictions or bans implemented by certain countries.


I have not tested this app myself, so I cannot "recommend" it as such, but I think based on the information provided it should to the job for you. Good luck!