Snipcart - Redirect customer to custom thank you page

How do I redirect customers who buy a particular item to a different thank you page than other items?

I want to redirect them to a thank you page that has a link to a page on the site. How can I do this?

I found a way to change the thank you page

https://snipcart.com/blog/customizing-your-e-commerce-thank-you-page

for all products but can't find how to modify the thank you page for a particular product.