The Midrash Tanchuma when explaining Korach's argument calls it a טלית שכולה תכלת, a garment made entirely of techeiles. Later it says לקח טליתו which may indicate that he confronted Moshe with his own garment. That said, there are some who have explained his argument as referring to the me'il.
R. Yisrael Ariel suggests this in Ma'alin Bakodesh Vol. V p. 24:...
According to the Gemara (Eruvin 103) and Rambam (Kli HaMikdash 10:8), something smaller than 3x3 (tefachim) is not a beged if shelo bmokom begadim (not in place regularly clothed):
מר רב יהודה בריה דרבי חייא, לא שנואלא גמי, אבל צלצול קטן -הוי יתור
בגדים. ורבי יוחנן אמר: לא אמרו יתור בגדים אלא במקום בגדים, אבל שלא
במקום בגדים -לא הוי ...
There is an institute in Jerusalem that seeks to recreate them to have them ready at some point in the future.
Otherwise, using them today is misguided. At the bare minimum, they contained a mix of wool and linen, which is prohibited to wear unless specifically commanded to do so, i.e. by priests in the Temple.
Rabbi Aryeh Kaplan notes this in his ...
Rashi Vayikra 6,3 says The torah calls the tunic מִדּ֣וֹ when it is normally referred to as כתנת. The word מִדּ֣וֹ comes from the word מדתו which means the Cohen's exact measurement as the Ibn Ezra (ibid) explains:
מדו. חלוק וחכמים אמרו שהוא חנוק כנגד מדתו
The Tunic Chazal explain that it has to be enstrangled to his body so that it should be the Exact ...
The Temple Institue has apparently chosen one of the opinions for the Choshen Mishpat. The web site statement does not say who determined this particular psak.
However, the research page states that this was examined by a team of experts in halacha as well as gemologists.
The stones of the breastplate - recently created - were investigated
with the help ...
Keli Yakar to 28:6 says that only the Ephod and the Aron as well were constructed by the entire nation, since they come to atone for Avodah Zarah (Arachin 16), which the whole nation sinned in at the Ma'aseh Ha'egel. However, for the other garments, as well as the other vessels of the Mishkan, it remains in the singular form (presumably aimed at Moshe).
Welcome, and great question!
This is one of the many questions that Ramban (Shemot 28:31) asks on Rashi (and others), and he therefore rejects their opinion.
However, in responding to Ramban, Mizrachi (28:33) asks right back - what's wrong with pomegranates? If it had said another fruit, you would have asked the same question:
ואיני רואה מקום לאלה ...
It doesn't apply only to the me'il. Rambam (Hilchos Klei Hamikdash 9:3) says:
והקורע פי המעיל לוקה שנאמר לא יקרע והוא הדין לכל בגדי כהונה שהקורען דרך השחתה לוקה
One who tears the border of the opening of the cloak is liable for lashes, as [Exodus 28:32] states: "It shall not be torn." This applies to all the priestly garments. One who tears them ...