Additional bell mounts and isolation washers are available on the RS website
Small Bell Mounts - Type CFAB
Low-profile and easy to install Built-in fail-safe device to provide shock and failure protection for mobile, marine or seismic stationary applications Provides large static deflection, low natural frequency (to 8Hz) and high isolation when the rubbber works in shear and compression Applications include generator sets, engines, tool room machinery, pumps, HVAC, special equipment, etc.