Jasongins, you can check out
Amiga Explorer, CrossDOS,
Twin ExpressAmiga Explorer and CrossDos are commercial, but you might have a hard time finding an old enough version of CrossDos to run on 1.3 (you never mentioned what OS you're running)
Twin Express is free, but it's a little less polished than Amiga Explorer, for example.
If you're into a real hardware solution (not just a null modem cable between the machines), the
CatWeasel3 works just fine.. You plug it into your PC and you can transfer disks with a small Windows utility. (it's much more versatile if you use a Real Amiga or MorphOS to command it, but it works fine in a PC too)