You may be better off checking in the garment district in LA for twill. This is southern California & not much demand for twill here because of the weather.
I don't know about that brand, but I am guessing so, it is one of the largest fabrics stores I have been too
I quilt so I look at the cottons only. Wish I could help.
I can't say they carry Hampton Twill but they have so much fabric it is like being in your favorite candy store
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