[totaltec]

I've looked at it, and it seems that the sale module uses default templates that are used to display products in a category. So it doesn;t have its own template to modify and achieve this.

So we would need to create a module, or extend a custom module that you have already created, and add our own template into the list. The viewer class in the module would need the getAllowedtargets() method to allow only "sale_products", and this would limit it to the sale page.