Mahout : user that bought XX also bought XX

Question

I found similar questions but the answer didn't satisfy me. Essentially I would like to implement in mahout an item suggester based on purchases (or even ratings). In mahout it seems that you have a user item model and the reccomendation is about user. Now I understand that we can replace the term user with item and having an item - item reccomendation but I think it would not work as expected. For instance if we have this data:

User Item
1    1
1    2
1    3
2    1
2    3
3    1

and if I am on item 1 page and I ask for a reccomendation, I am expecting item 3 as result because it is chosen more than item 2. I don't understand if this is easily configurable in mahout and how.

Thanks