You have 2 options one should be out of the box. the other you need to report 1 at a time.
The first and ideal is a cross sell report. It will show a selected product and any other products in order of frequency it was sold with. The problem is that its a one to many relationship.
If you capture a transaction ID at time of purchases and then associate all items in s.product then you can compare what items at time of a given purchase were sold together. You then could filter in exel combo matches... not as nice as cross sell.
A sort of thisr option is make a segment. For products in a transaction.