Is there a cocaine patch?
No, but there classes that will pay you to stay clean and at the same time it'll help you.
SCRAM means Secure Continuous Remote Alcohol Monitoring. It's only looking for alcohol. There is another patch called PharmChek, which looks for cocaine, marijuana, opiates, amphetamines, meth and PCP. However, the patch is tested with GC/MS which can be programmed to look for just about any drug you care to test for.