Here is anothe r idea. It may or may not be a little too far "out of the box", but I'll throw it out there anyway. If he or someone else has access to the Jammer Pro Line of products, it supports just about any kind of meter you could want ( including 7/8 of course ), with the ability to easily edit a little data here or there and come up with unique ( Jammer format ) styles of your own.

The resulting data can then be saved as midi data and converted for use on an arranger via one of the conversion programs. Maybe or maybe not helpful for him, but just thought I'd thrrow it out there.

AJ