They sell various Walkers Wood products at the Pete's Market on 44th and Pulaski (and I imagine at other locations.) I noted today what jerk products in general they have. Right now, there's 8 shelves about two feet wide dedicate to just jerk pastes, marinades, and sauces. They have Walkers Wood Mild ($5.49) and Walkers Wood Hot & Spicy ($4.99) pastes. They also have the marinade. In addition, they have jerk pastes from Pedro Plains, Jamaican Country Style, Eclipse, Carib, Eatons (the Eatons varieties include Boston Bay style, mild, and hot pastes). There are also marinades by Pedro Plains, Walkers Wood (as mentioned), and Island Pit. In addition, they have Eatons Jerk Ketchup, Triple J Jerk sauce, and Pedro plains honey jerk sauce.
That's all I was able to note on my phone. There were a few other products, too, (including Jamaican hot sauces) so that's not meant to be a complete list.
Pete's Fresh Market
4343 S Pulaski Rd
Chicago, IL 60632
I am intrigued by the Eaton's products. According to their website, the Boston Bay style is basically an ultra hot jerk paste, so that's up my alley. I'm just going to have to buy up a bunch of these pastes one day and have myself a good ol' jerk-off. Wait, that didn't come out right.