I'd suggest you order a 2 7/8" die. If you are handy, make one out of cold rolled steel - it will last a long time (back when I was really poor I made additional tooling for a P-W 375, but no 10's). If all else fails, you will cut back the top, not the bottom, of the die. The only stations that will have to be reset are the crimp starter and the crimp finishing stations.

P-W 375 is a great single stage tool!!