iphone 2g housing

hi, first time here. i was wondering if anyone knew apart from ebay(too expensive)if i could get a back cover with the antenna cover for my 2g iphone? i am looking for a cheap one. this is my first iphone i love it but its a bit tatty so am trying to get hold of a newish one to make it look better. if anyone can help i'd be so grateful. thanks

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