The linkage heimjoints use a smaller bolt (SAE vs Metric) than most other brands, so generic linkages don't appear to be very accessible when I looked recently. I didn't try to chase down just levers, there is a chinese rearset kit that includes a lever that is ALMOST swappable, but it expects to be on a bracket like the Uylsess setup so it's linkage connection is offset and would bind if you tried to swap it without the bracket. With the bracket the lever sticks out a bit more, pivot point is moved down and forward, but the lever is also longer so would work. The chinese kits don't include the linkage, or bolts to mount the bracket to the primary cover FYI.