I can buy PC joystick extension cables here that work in the AES, however depending on the "brand" they have available when I go to the shop they might need some "circumcision" to fit the deeper AES hole (that sounded awful).
I've already bought and shipped them for people in the UK and France, I guess I could the same but including shipping from Spain it would be a bit expensive. If you can't find them anywhere else you might want to try this, and I'll figure out the total price, just PM me in that case. Thanks.