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I have some grommets for sleeving holes in TJI type joists with 3/8" webs. They are rated for 275* and fit any size hole.
The manufacturer's web site is
A bag of 25 pieces, one foot long, is $8.75. ($.35/foot). (They are not continuous coils even though the web site says they are).
I got 2-3 holes per piece, about 1/4 the price of insulator type sleeves. 4500 square foot house used about 50'.
Please email me if you are interested, or call.