I've relined alot of brake bands for cranes over the years but never anything for a steering clutch, especially a wet type. Based on what I've always heard there is a difference between friction material designed for wet use vs material for dry use. If nothing else the difference in the coefficient of friction between a wet clutch and a dry clutch would be different so where you'd need one type to work dry, it would be something totally different wet. Beyond that, what the actual difference between the material types is, I don't know, but I would imagine everything McMaster has is designed for dry use.
Before I'd do anything I'd give the guys at CECO Friction a call and get their opinions on what you'll need. I've been doing business, off and on, with them for nearly 12 years and they have always been very knowledgable and helpful when I ran into needin something odd of different.
Hope this helps, and good luck.