I need help looking for vintage collegiate merch from Bellevue College, WA

Current merch they offer at the book store looks a little cheap or either is mostly made of polyester and would like to find something from the 2000s or earlier that is stitched or embroidered. I am looking for anything such as a shirt, boxy polo (long or short), windbreaker, or sweaters.

I have already look at FB marketplace, EBay, Depop, Mercari, Offer up, Craigslist, Poshmark, and vinted and all their selections are extremely limited. I am wondering if anyone has suggestions of where to look both online and in person, or if anyone has one.