I am not sure that it would work out of the box, simply because the uStore Admin UI will certainly check that the uProduce production job related to the uStore Product is of type "PRINT", whereas uProduce jobs with InDesign Scripting are "CUSTOM" jobs, submitted via the uProduce API.
So, except by hacking the uStore DB - that I do not want to suggest on a public forum - I am afraid that it won't be easy.