Yes, you need a soft loc style clutch. That dual friction will tear stuff up. Lots of parts are available through Liberty's Gears, new and used. Great people to deal with.

Soft Loc is the nickname for most Long style pressure plates. They can come pre-set, adjustable base pressures, and adjustable base and counterweight. I have always liked Ram over McLeod. Custom and modified clutch setups can be had from Hyatt, Advanced and Black Magic. All excellent clutches, and people who run them. You can't go wrong with any of them.