No worries! That’s what the community is for 
Hopefully we’ll get you up and running again.
I don’t know if even any city based electronic stores would be able to help with the Gameshell given how custom built and specialised it is. They would have to have been on the forums to work out how if all works.
Are you all good with flashing images to SD cards?
I have some simple installation instructions here that should basically be the same for most images:
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