As per the title really, can anyone recommed the best place to get them from?

Cheers,

B

MK sportscars do them, I mad my own for the silvertop

If you can find some universal mounting rubbers such as land rover mounts it is easy to make your own. Any local welding shop will help if you are unable to make yourself. Very often purchsed items do not fit as needed so you end up making your own.