Welcome to TFP!
I understand what you are saying, and really do applaud you on your desire to get right to it. Usually we are faced with "I will look in to those kits" situation that never resolves itself so it always nice to see someone who really does understand the importance. That said, it really is worth the extra day or two wait to get the TF-100. Yes, you might be able to find a k-2006 locally or online, but there are no guarantees on how old it is (sadly they tend to gather dust at pool stores with people going for cheaper options) and online there are questions of customer service that you don't have to question with TFT. So, most importantly is that you get the proper kit, no question, but I personally say it is worth the minor wait to make that kit the TF-100.
Whichever option you choose, welcome again to the forum and we look forward to helping you!