Suggest Remedy For Restless Legs Syndrome

I have been taking sinemet ,a dose of three taken through from 6pm til 4am for resteless legs syndrome for about 20 years. My legs now jerk rather than are just restless and I find it very hard to get a good night s sleep. I have also been prescribed half mg of clonazepam to take when going to bed. This condition is getting worse. I am 70 years old. Can you suggest an alternative treatment I can talk to my doctor about?