This sortable listing shows most of what’s available, but not all (others for some reason are listed individually by school AND size):
https://smile.amazon.co
Here is a search to find individual listings:
https://smile.amazon.co
Anything below $10 or so is add-on; msrp $70.99.
Make sure the school matches the picture; there’s an item for Minnesota Golden Gophers in the sortable listing that is actually Minnesota State-Mankato. That’s the only one I noticed, though there may be others. (There is a legit Golden Gophers among the individual listings).
Reading the reviews, a lot of people say these run big (some say 2-3 sizes too big). But there are also reviews saying they run small. FWIW, I just got mine today; I ordered up because I want longer sleeves. I got an XXL, normally wear XL Under Armour. For me, the sleeves are shorter than normal UA long sleeves, but UA long sleeves run longer than other manufacturers. So the sleeves are more "normal" length like Nike or adidas. The length of the body is a little longer, and the waist runs pretty true to size. Hope that helps.