clickbank product page structure question

testing a product with ppc right now to increase conversions and already have the product and an upsell for that product approved and ready to go in clickbank but as I was looking at the linking structure of the pages I realized something might not work here. Let me know if there is a way to make this work.

with CB product 1 on the salespage when the customer clicks the buy now button, they pay for product 1 and then they are redirected to....

CB product 2 salespage where they can agree to buy the upsell with the order button or they can click the link below it to just goto CB product 1 download page.

If they take the upsell, they then pay for the 2nd product (separate transaction from 1st product) but are then directed to a different download page where they can get both product 1 and 2.

Here is my problem: If both products are listed in CB what if someone clicks on CB product 2 salespage from CB without viewing or buying product 1? they would then be able to scroll to the bottom of the page, and just click the link to receive cb product 1 without paying

How can I solve this? Since both products have to be listed in CB how can i make the 2nd product salespage only available to be seen when someone purchases cb product 1?

is there a way to "hide" a product from people searching for products to buy from CB in general so that the 2nd product cannot be promoted by itself?

hope this makes some sense

thanks for any help