RE: Chicago style relish
If the Chipico/Vienna trail runs cold, you can try Fluky's. From their web site:
Fluky's first started in 1929 on Maxwell and Halsted Streets in Chicago. We carried all the character and romance for which Chicago Street Merchants were famous, and Fluky's reputation as having the best "Hot Dog" in the city started to grow.
PRODUCT DESCRIPTION: Our ever famous Fluorescent Green Relish is the most popular product besides our beef. Coming in four one gallon containers, it is often referred to as "Piccalilli" by those familiar with the Chicago Style Hot Dog. This sweet relish contains only premium ingredients, and requires only a teaspoon to decorate the Dog.
Good luck! BTW, where is your cart???