Maybe someday Festool will fix this situation they have got themselves into.
While I think people are trying to help with various "solutions" in the end it doesn't fix the simple fact that folks just want to be able to buy the tools in metric, new, anyplace, any time. People mean well and are trying to be helpful, but I think a lot of folks just get frustrated even more because the more "work around" people find, the less the original issue is addressed.
Swapping parts, stickers, buying used, having someone know someone who knows someone wanting to sell one etc, does nothing to address the real issue and really doesn't help folks.
When someone gets an urge for a tool, a real quick way to have that urge killed is realizing it's no longer metric. And now a double whammy of realizing buying a new tool means it coming in a systainer 3. I've gone down this road so many times where I decide "oh, why haven't I bought this, or "hey, I could use that" and then come to a halt when I remember the metric issue. All it does is causes me to check out other companies stuff. From a business standpoint having people willing to spend a bunch of money on something they very well don't really need, but are still wanting to buy is great. Having that sale blown because you stopped making it the same as you make it everyplace else is just a dumb way to blow a sale.