Loose-Wiles Biscuit Company was founded in Kansas City and Sunshine Biscuits is still making Cheez-It crackers in Kansas City, KS so you do see various Sunshine Biscuits and Loose-Wiles ephemera at Kansas City antique shops from time to time.
Today was the first time I spotted a Sunshine Biscuits apron with both Sunshine and Loose-Wiles branding on it though!