Hi Matt,
I can create a "related products" block for your Prestashop site, Please do tell me if you plan on creating a custom relation between products or you would like similar products belonging in the same category to be displayed in that block. I will also setup a block to display "customer who bought this, also bought".
I am very well versed with prestashop and I have underbid for this project as I am starting out on freelancer.com and would like to create a good reputation, Please discuss your project in private message and i will be more than glad to answer any queries you may have. I can start working immediately and my primary goal is to complete this project in timely manner and to your satisfaction as a positive feedback/review would mean a lot to me.
Cheers
Kunal