When your Lead Complete event is fired, how do you capture the product? Is it in the Product dimension? Assuming so, just use that to slice your data.
E.g. create a simple table with Page as the dimension and Participation Lead as the metric. Then drag in the specific items in the Product dimension you are curious about underneath the Participation Lead metric so that you have one column for each product. This would show you, for a given product, which pages most often participated in a visit that included a Lead Complete.
Or do the same, but this time break down the Pages you're interested in by the whole Product dimension. This will show you, for a given page, in visits where users looked at that page and then had a Lead Complete, what product was that lead complete for?