Plugin recommendation to request review on Amazon

Hello,
I’ve seen a variety of autoreponder plugins, as well as ecommerce solutions that request reviews for purchased products, but what I’m trying to to do is a little different (I think). My site allows users to register their product so they will be notified about warranty information or future promotions. I want to set up an autoresponder so that when they register, they will be emailed with a link to their Amazon purchase so they can leave a review there.
The best I can come up with is an autoresponder with a link to the product page, from where they will have to navigate to the “leave a product review”; I think that’s not a great solution, because it doesn’t make it easy enough.
Is there a simpler way to accomplish this goal (prompting customers to leave a review on Amazon)?
Thanks in advance