Reccomended products on Debut from other collection

17 0 5

I have a number of product collections; invitations, placecards, RSVPs, Thank you cards. Each collection has 8 designs.

I am looking for a way to show the related products at the bottom, so when you visit invitation 1, it says "you may also like" placecard 1, thankyou card 1, RSVP 1 etc.

At the moment It is saying 'you may also like' and showing invitation 2, invitation 3, invitation 4. 

Any help would be appreciated.