I'm not sure of the space or measurements for the 14 but we had a similar problem / issue with our 16 a couple of years ago.
I did explain, at length, in a similar post but can't recall which one!
Anyway, we tried Bunnings, Harris storage etc for a drawer unit to fit and did buy a couple to bring home and try. No go as they wouldn't fit easily without removing the cupboard trim. We even had a cabinet maker look into it and the size required was non standard....at least ours was.
I ended up getting a plastic 4 drawer unit from the Reject Shop...just happened to notice it one day...and removed the top draw (easy) and it fitted perfectly.
We always thought it was temporary but it ended up so useful it became permanent.