@fi_kirra replacing the mounts would only help if the existing ones are worn out. When they're in good shape, the rubber is fairly firm.
The exhaust shop may or may not have replaced the mounts, I suppose if a year or so ago the mounts were in good shape then they may not have bothered.
In any case, if you want new mounts, this is the correct part https://www.sparesbox.com.au/part/mackay-exhaust-mount-exm3617