"meg" in connection with a verb usually shows that the action is finished. It doesn't really matter in this case, you could just say "ezeket hol találom?", other example: "ettem a levest" (I was eating the soup), "megettem a levest" (I ate/I've eaten the soup)
I am trying to wrap my head around this in this context. I understand the difference between ''I was running" and 'I ran' but not quite sure how the action was finished when someone is asking how to do something in the future.