Interesting. If it's a 310Cv, it must be the Limited Edition, and according to wikipedia (which, as we all know is 100% accurate....) is mapped by ABT Sportsline.
SEAT Nederland announces the production of León Cupra 310 Limited Edition, with 2.0 TFSI engine upgraded to 228 kilowatts (310 PS; 306 bhp) of maximum power and 425 newton metres (313 lbf·ft).[27] The production has limited to 100 units.[28]
SEAT León Cupra Pies DescalzosIt comes only in Candy white or Infiri black. The Cupra 310 Limited Edition features beside the OEM Cupra equipment an engine management remapping by Abt Sportsline, black Orion-alloy wheels, an alarm system, bluetooth connectivity and special 310 Limited Edition badges on the sides and the rear hatch. There are also stainless decals inside the front door frames displaying the 310 Ltd logo. A badge on the dashboard displays the serial number, and the car is delivered with a key ring to match. Full factory warranty is retained with the power increase that increases the top speed to 259 kilometres per hour (160.9 mph).
May be an interesting file to see whats been done, but I doubt you will find much more from pure ECU tune by the looks of things.
-Gavin