Replacing engine mounts on an MA engine

Hey guys,
First post,
I have a 1982 Mazda B1800, running the MA block.
I have been to a number of auto parts stores and I am struggling to find someone who can supply me new engine mounts and a search of the wrecking yards is no good as they don't even have trucks this old.
Does anyone know where I can get the engine mounts to suit this motor new, or is there anyway that you can replace the rubbers in the mount to get passed a roadworthy.
I'm in Australia too if that helps
Cheers guys

For anyone else who runs into this issue, there are 2 suppliers in Australia who make these mounts. Mackay Rubber is the first and retail you are looking at $180 for each mount (Left and Right), the other is Transgold who I have purchased some through and they were $100 a mount.