Or you could go with something like this from your local industrial supply house, these are less than 20.00 from McMaster Carr in the US.
Bolt-Down Vibration-Damping Mount
Fail Safe, 1/2"-13 Thread, 471 lb. Capacity
Thread/Hole Diameter 1/2"-13 Capacity per Mount 471 lbs. Deflection @ Maximum Capacity 0.13" Durometer 30A Overall Height (A) 1.78" (B) 2.42" Base Length (C) 5.50" Width (D) 3.37" Mounting Holes Diameter 0.51" Center-to-Center 4.12" Color Black Additional Specifications Fail Safe Keep mounts stationary in compression
load applications—mounting holes in the flange base allow you to fasten them in place. Mounts provide vibration, shock, and noise
isolation for rotating equipment
such as fans, blowers, pumps, compressors, and generators. Made of oil-resistant rubber with a steel
base. Styles 1-7 have a tapped hole in the center that allows you to use your own threaded rod or bolt; Style 8 has an unthreaded through-hole. Base has two mounting holes, except Style 7 has four holes (fasteners not included).
Fail-safe mounts have an interlocking steel
design that keeps the mount intact even if the rubber fails.
Styles 1&2—Temperature range is 10° to 180° F.