It is a more complex topic. There is rather an algorithm to do this, as opposed to just a piece of code.
At Cart Defender we will have an out-of-the-box feature to recommend products. Automatically it will create the cross-sell opportunitites for your visitors. It won't be free, however, as we expect that to increase sales and provide a lot of value to the visitors.
At this point I could only propose a custom-made product bundling / recommendation feature.
Best,
Radek
Cart Defender - slash cart abandonment and drive sales with unlimited intelligent conversion popups. Forget A/B tests because Cart Defender optimizes itself automatically. Web Summit 2016
