I've heard all the T/A stripe kits available on the market today leave something to be desired. A member of another site who was restoring a T/A had to send back several sets of stripes before he got something he could live with.
I may be wrong, but I believe Phoenix Graphics and Performance Car Graphics are the only companies making these stripes now, places like Year One and The Paddock just buy the stripes from one of these sources and sell them, at a markup.
Dave from ECS said that he is looking into making T/A stripes. If he does make them, you can be confident they would be exact duplicates of the originals.
Before buying any T/A stripes, I would definitely talk to ECS to see if and when they will offer them.