I have a 55-02 that came with Elixirs. I took them off and replaced them with MTD Nickel Custom mediums. I have them strung through the body, and they fit fine. You may have to remove a little of the fuzz at the end, but the wire wrap itself is fine.
I have found these strings to be not only very comfortable, but also extremely accomodating tonally. With the 55-02, I have been able to get a nice, mellow tone as well as a dialed-up, crunchy tone.
They're around $30-35
online, and are also available in Stainless.