[please think of an] example [of] a Scripture text or reference [that could be used in this manner] being such a direct witness for the truth [that it could be a justified use]
Okay, I've changed what you said into what I heard. If you agree that's what you're asking for, here's my reply: Yes, I am able to think of tons of examples where the Spirit of the Law overrides the letter. Here's one: Jesus is the Lord of the Sabbath, and when his disciples were criticized for gleaning fields (and 'working') He defended them. He even quoted an example where David broke the idea that they had about "shewbread" just because he was hungry. The concept that I could call to mind here is that we know that these things are "for us" and not "against us". I'd be willing to defend the use that you are speaking about.
The truth of the matter is that the only reason that cutting (not specifically ink) was prohibited was BECAUSE it was used primarily by heathen to identify with worship of their gods. We are no longer identified by body marks, but in the inward man and it is a very clear marking that others can see too. It's not because of the tee-shirts that some Christians wear that they will know us. They will know us by our love, one for another. That's the solid of it all. We are not looking at "signs" anymore but looking at hearts and each person is a testimony of the work that has been done in him.
There is a difference between the stubborn people who were taken out of slavery and complained about it, between those who were invited to come up to the mountain but feared for their lives... and those who followed closely after the Savior as they beheld them. The strict law was for one group. The outcome of that law, changed hearts, was for the other. We will all do well (self included) to ponder these things as part of being able to go from milk to meat. The whole bible testifies that even the lives of the ones that went before us were guided by the Holy Spirit for our benefit and not for our detriment.
But before somebody quotes the "weaker brother" argument, let me remind that I am not advocating but instead am imagining a defense. I think it's a solid defense. Especially when we look at how often it is said, "if it is sin, to you? Don't do it." and things like that in this thread.