Here's a store that makes polyurathane bushings. They seem to only have 1 model and claim it fits 370z and G37 too. Might want to get in contact with them.
Nissan Solutions
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GTM Twin Turbo Stage 2|GTR Turbo/Engine Gauges|KW V3 Coilovers|HKS Exhaust|Oil Cooler| Vossen CV1
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