I am trying to find a main breaker replacement for a multi-gang meter base for a tenant complex. The main breaker is a ITE Seimens Q2100H and all the web sites and supply house I have gone to do not reconize the breaker. The breaker is a 150amp single phase breaker. Not a molded case breaker. Looks like a standard 1" two pole circuit breaker. How hard can it be to locate a replacement breaker. Please email me at email@example.com. Thanks in advance for your help!