mapped

Anybody with a 200T been able to get the Trophy gearbox update or know of a good aftermarket gearbox map?

basically, ive got a small problem which when i boot it on the motorway get the 75-80 thr glow plug light comes on, then if i lift off a sec the light goes out then i can floor it again and itll goto whatever speed i want it too, when the light comes on it lacks power.. its really annoying as...