I don't have a wee at home anymore so I'm working of my memory, can you post photos & links ?
Most aftermarket stuff or from other brands of bikes will work.
A few things I can think of to look for,
The clutch lever must have enough bend in it to get over the switch gear
The cable hole in the lever must be big enough for the Wee's cable end
A mounting hole for your mirror,
You will need to bypass the clutch switch (that is OK on a 2006) that means the bike can start without pulling the clutch lever in.
Your levers should not be tight on your bars they should be able to spin, this will stop the damage you have, teflon plumbers tape around the bars before installation is the solution.
Most aftermarket stuff or from other brands of bikes will work.
A few things I can think of to look for,
The clutch lever must have enough bend in it to get over the switch gear
The cable hole in the lever must be big enough for the Wee's cable end
A mounting hole for your mirror,
You will need to bypass the clutch switch (that is OK on a 2006) that means the bike can start without pulling the clutch lever in.
Your levers should not be tight on your bars they should be able to spin, this will stop the damage you have, teflon plumbers tape around the bars before installation is the solution.