Most immediately, more clonazepam (or ativan, or diazepam, or alprazolam). I have 6mg clonazepam to last me the next 2 & 1/2 days, which will keep me from tearing my hair out, but not exactly keep me comfortably chilled out.
More long term, an opiate I can smoke (probably fentanyl, #3 heroin and opium aren't realistic for me). I haven't taken a holiday from my subs in 5 months now, and the itch is building. I've decided that on my next holiday I'll try getting high without stabbing myself with needles for the first time in 3 years (I'm not sure if that's because I want to be safer and healthier, because my veins are getting messy and less effective or because my recent misadventure with etaqualone reminded me of how much I love smoking drugs).