Hi [...], welcome aboard
The equivelancy between Restoril and Klonopin is .5 mg klonopin is about equal to 20mg Restoril, but the other difference is the half life of Klonopin is about twice as long. I don't think it would be a good idea to "gut it out" since dropping even a very small amount could cause symptoms. It would be best to get with your doctor and explain your predicament and ask him for a temporary refil of klonopin, he should understand.
If nothing else you could substitute the Ristoril for the lack of Klonopin but try to keep the equivalent the same as you're used to so you can avoid symptoms if possible. Again, I would call your doctor though.