If you buy a display from somewhere else you will also have to buy a new controller to match it, or it will not run. You will need to match your motor plug and the plug setup on your old controller. You can go to a julet style plug, but then you will also have to replace your wiring harness and other accessories. By far, your cheapest way out of this is to buy the old unit from Engwe. I looked at Amazon in Spain and I don't see anything there that will help you. If you want to change everything over, you can start looking at Aliexpress, but you will be in for a lot of DIY. I picked up a cheap Engwe in the winter and I'm in the middle of rewiring the entire ebike, just to have the settings I need, there really is not much else you can do.