I mentioned keys briefly in my eBay post. However, the thread where I came up with the info popped up again on Vortex. Most notable are TREFTTY's words on the issue of replacing keys:
Honestly, and this is from experience. It is cheaper to just go to the dealership and have them make you a non FOB key and program it. It will cost you less then 150 dollars total. Then get yourself an aftermarket alarm (Viper, Python, Clifford) that is made by DEI. This should cost no more then 250 dollars installed. You should go with the Python 460hp. It will be perfect for a TT and you can use it to arm and disarm your factory alarm as well. I used the factory horn instead of the DEI Siren it just goes better with the cars style. This will give you two keys both with remotes and you can take a key off and take it into the water with you. You will have invested about 400 dollars this way. If you go to the dealer and get even one Keyfob remote you will have spent at least 350 dollars (And that would be a good deal) when it is said and done. I have heard of people paying over 500 dollars for the key, remote programming and immobilizer programming.
The best part about this way is that you dont have to worry about the keyfobs becoming decrepit. Those things get really messed up really quick. Also you will be able to go get a new remote for less then 50 dollars anytime you need one.
Just another option for you. Those keyfobs are just big bulky pieces of monkey **** anyway. Once you get over the cool switchblade thing, they are annoying as hell.
Rest of the thread here: