You can simply create the updates folders yourself and include only the modified files which are listed in both of the .md5 files as well as the patcher if you have used the Update button.
Should be something like:
Code:
SD:\wiiu\games\TMS [######]\meta
\code
\content\Pack
\updates\v1.2\
\meta
\code <- Copy the same files from the base game here
\content\Pack <- Copy the modified files from the patch here
Unfortunately, this method will simply waste huge amounts of space on your SD card as ALL of the largest files have been modified. The game rings in at around 12GB and your update folder for v1.2 would be nearly 9GB in size so you're looking at using up 20GB of space for, frankly, no benefit. I can see wanting to do this if you want to switch between stock and mod to see costume differences, but I don't even consider the stock NA release to be the actual game, just a cooked up abomination.
To each his own.