As the title states, whats the cheapest (and best selection) to get nascar merchandise/ memorabilia? I’m going to my first nascar race soon and want to have some stuff to wear!

I need expensive things, like electric water pump, carb, air cleaner, heads, oil pan, etc. Things are just to expensive through summit or jegs. Is there anyway to get discounted parts anywhere other than ebay or craigslist?