Here is a good tip to find hard to find parts, components, older technology or just something not very common here in NA...Many of dicountinued components are still sold as a current models in many countries all around the world. Even with shipping charges it may well be worth to purchase there, or if you know someone there it may be even easier.
Just a quick example Nexus 7 parts in PLN /Polish money/ About 3PLN =$1US
http://www.rowerystylowe.pl/p-3869/c...himano-nexus-7