I've got a box load of Amiga World issues, but I don't recall this particular cover. I'd have to look through my box of mags.
Funny thing about the cover shot, I don't recall any direct to negative machines being driven by an Amiga back in 1998. Although I could be wrong. I do have a beta driver for an Encad Display Maker large format inkjet printer, so anything Amiga is possible.
Wait. The box of mags was easy to get to and I do have that issue. Not willing to part with it though. What is is that you are looking for?