While you have spent so much $$ I see no logic behind Soundstream splits. Why not go for recognized and award winning high end brands like Focal, Morel, Rainbow, DLS, Hertz and Dynaudio?
Secondly, as you already have a 6050DVD upfront, why do you want to go for a AVIC unit? or will you replace the 6050DVD?
As far as your required stuff is concerned, if you have any friends or family in UK/US you can ask them to ship it to you via DHL/Fedex etc.