Hey mate.
No exactly ire about the rubber you ere taking about unless your talking about the engine mount that lots to the frot tore are crossmember
If so then it's jut an engine mount
You would be able to get the engine mounts from most auto parts stores or suspension shops,
Have heard also about the different rear engine mount for the SP20's but never noticed any difference between any I've worked on.
Another option is to get Hard Race engine mount a nice upgrade from stock wth out the harshness of the AWRmounts, and less prone to breaking compared to the OEM type