Perch Item Index and Pagination

Hi,

I am adding some ecommerce tracking to my Shop site, one feature of which is tracking product views when in a list, part of which is the position of the product. My function looks like this:

perch_shop_products([
  'template' => 'products/category_grid',
  'sort' => 'priority',
  'sort-order' => 'ASC',
  'sort-type' => 'numeric',
  'count' => 24,
  'paginate' => true
]);

I thought I could use perch_item_index for the product position in the listing, but this resets on each page. Is there a way to get the product's overall position rather than the position on the page?

Thanks for any help

Mike