"...it is best for church leaders to cultivate a culture of modesty from the inside out"

Not quite, Darrell. I’m not saying that they would have been unable to acquire clothes modest by Biblical standards; I am saying that they would have been unable to acquire clothes that are modest by modern fundagelical standards. There is a huge difference, and the quicker we start looking closely at how the Scriptures (especially the OT) describe things, the better. And history—the difficulty of making fabric and sewing it by hand (give it a try if you doubt this, Darrell), the necessity of the urgencies of childcare in church (Nestle invented formula in the 19th century), the realities of Roman slavery, and more suggests that the early church would have defined things far differently than we do.

In a nutshell, we might end up at the same place in what believers wear—I’d guess we’d tend to have our belts at our natural waist or upper hip, wear our clothes a touch looser, and the amount of actual or implied decolletage seen in churches would decline a lot as well—but the Biblical logic of how we get there would greatly change.