Ask the 'guy in your work' where his map is from, how much time went into development and for some data such as dyno graphs, long term road test data etc... then you will find why the better product is more expensive, after all, you will get what you pay for.
Find your local friendly REVO dealer and give them a call or go to REVO directly and you wont be dissapointed. There is no plug-in available as such and your dealer will be able to set up your car to your requirements, theres no live mapping for the Tsi ECU system as such.