Carl, trust me when I say shark can't do the dsg map either if they have told you so it is misguided info as they can't. The only people who can do a full on proper dsg stage 3 remap is hap motorsports in the states, on all new models. I know this as I have been looking into it for months and have to send them my mechatronics unit over for them to do this, which is being done as we speak. Hope this helps.
I didn't think they could to be honest but that came from the owner, Ben and he responded to my question in a public forum.
Let me know how you get on please