I wouldnt bother with a remap on the N/A car either, ford dont get the map wrong enough for it to be improved upon significantly with such a mild change of spec IMHO

Maybe you can put it on the rollers before and after and get agreement that unless you see X amount of gains, you get your money back, that way you have nothing to lose?
Although I have no idea if your local evo chips dealer would go for that of course, but I dont see why the wouldnt if they are confident in their product