You should keep searching this forum for Zeetron reviews then, as it's clear you have a lot to learn. There are numerous threads detailing reviews from others that have purchased from Zeetron before, and the majority are unsatisfied.
There isn't a clear winner when it comes to a company within the U.S. selling the color swap kits. NONE have 100% perfect items, so the next important issue is the customer service availability of that company and the likelihood that you'll be able to exchange/return your defective item in the worst-case scenario.
Good luck with your search.