My you guys are an active bunch.. half a day and page 2 already!

What I heard from my mechanic, he says Toyota's cannot change bushes, as thier bushes comes with the whole set of whatever it is attached to. Its generally not recommended cause its not meant to be changed. True? He might pulling my legs. If this is possible, it might be good, as it will "tighten" up your car when going over bumps.
Engine mounting should be still doing fine. Not much rattle during idle.
When you mention Rubber lining, you meant the door frame rubber?
Those are bloody expensive.. changing ori Toyota rubber will cost slightly above 1000. Any better alternative?
I considered Sound Proof. Ordered a few pieces from my local shop. waiting for stock to arrive.
Autofoam... Penang nobody doing >.quote]
no such thing as bushes cannot change. if that is the case why do spare part shops stock them? and why do aftermarket brands supply them? some items you have to buy in a pair, they don't sell 1 piece. for certain assemblies like the superstrut system you have to change a complete set of bushes consisting of like 6-8 pcs if not wrong. you can check with khwong regarding this. if budget permits better to change complete set. this way you can monitor and see which bushes wear faster than the others. that way you can prepare yourself with spares. if you google i think you can find a PDF manual showing you all the rubber bushes that you need for your car along with the part number. will make it easier for you when ordering from your spare parts supplier.
yes door frame rubber. the rubber lining that holds your windows and also the rubber lining that line the door. these deteriorate over time. thus allowing air to seep through, thus causing the humming sound during high speeds and seepage of sound into the cabin (like motorbike pass you, you can hear damn loud, as opposed to when you sit in other cars). as scott said, you can buy from halfcut. if you got extra budget, just buy 4 doors. that way you can have a set of spares for windows / door lining / lock switch / power window motor. if you dowan to keep as spare can sell in the forums. sure got other members looking for small small things like those.