I am not sure where I would buy the wrap, many choices. One thing is clear (IMHO) that it makes no sense to you because you evidently have not discovered a great sounding MIJ kit. The shells in question are the thinner ones with rerings, which resonate more, are easier to tune, have a fuller sound to them, and even can produce fatter and punchier BDs. With the right heads, good edges, good tuning, these old thin MIJs can sound amazing. I have read MANY drummers expressing the same sentiment about their MIJs. These days, so much has changed (dried out seasoned shells, knowledge about edges and tuning, head technology) that these MIJs can be made to sound WAY better than they ever did 30-40 years ago. There is a growing segment of vintage drum fans out there who have discovered this and this is still a very active debate that never seems to go settled. At the same time, I, for one, will NEVER sell certain kits of mine - purely on the quality sound I get from them - and presently ALL of my kits are vintage MIJs. The shells in question for this project are these thinner shells complete with about 90% of their hardware. I would not hesitate for one second to use them to build a touring kit, wrapped in new wrap, over buying a modern kit. Why? Simply because I know what I can get out of it (from experience); compared to many modern kits that I have seen (and owned) that are frustrations due to their disappointing sound. In a related story - I once took about 13 shells to a drum builder - who spent about 7 hours with me and my shells.....it changed EVERYTHING once new edges were cut and perfected. ....but that is a whole different discussion.
Ahh the age old debate. To MIJ or not to MIJ, that is the question - Whether it is nobler to suffer the slings and arrows of the intellectually lazy, or to take arms against them with the results of decades of empirical evidence contrary to their tightly held beliefs.