It's a 3" ffc cable with a zif connector on the end. Makes no sense. If you can the Gbasp screen into the extension you can plug it into the main board without the extension.
I don't think you have a clue what you're talking about. It's not just an extension; obviously it does some re-routing of signals. That it would be an extension alone is simply silly - the connectors don't even match.
I'm looking into a Taobao agent and hope to get my hands on one of these soon.
if you get to find those, please let me know where to buy it too cause i need to do this mod before a looong travel im making to Egipt, and the flight will least 23 HOURS (with 3 scales betwen), so i want to clear Pokemon Ruby and Emerald during the flight with a decent screen haha