I see Bun candy bars at The Dollar Tree occasionally.

i see them at save a lot every time i go

I never had one, but I remember seeing them given to the audience of Bozo all the time

Bun Bars first came out in 1928 by the Wayne Candy company, possibly out of Chicago. The Clark Company acquired Wayne in 1960. Today, Pearson's out of St. Paul sells them. These are really candy/peanut clusters, not bars. Vanilla's the best.

Found an ad for Bun on back panel of the WLS radio Chicagoland Hit Parade from Jan., 1972. A mail-in offer of a BUNwarmer sweatshirt, cherry red with Bun logos and flowery designs ironed on (probably for women). To get a shirt, customer had to send $2.50 and three Bun wrappers. Larry Lujack, morning DJ, pictured on front. By summer, Lujack was heard on rival top 40 WCFL. From a newspaper account, Lujack quit during the year, after station bosses insisted he work Saturdays, offering a small raise. During Lujack's four-year absence, Charlie Van Dyke, John Landecker and Fred Winston worked the AM drive shift at WLS. When Lujack started in 1968, he was made to work seven days, as most other DJs were in the day.