My mechanic was installing my kirk engine mounts and said he noticed a bit of sway movement when he was test driving it and when he looked under the car at the rear control arm (i think that's what it's called), he said I need to replace these 4 bushing as it's worn.
 
Is this the right kit?
 
http://twosrus.com/catalog/product_info.php?products_id=431
 

or is it this I need
 
http://twosrus.com/catalog/product_info.php?cPath=22_61&products_id=177
 

Also what size diameter do I get for 1992 Gen 2 3sgte? It has 16mm through to 24mm

Hi petmr2, sounds like your new/new mr2... So twosrus will charge you $60 US minimum for postage so if you need anything else get it at the same time.
Shop around but in saying that I ordered a kit from somewhere else and never arrived so ended up ordering from twosrus (reliable).
The kit is best if you want to keep the car - replace all of the bushings in the car - especially for the postage costs and little difference in the costs when you will need to replace the others soon by the sounds of it.
You will need to measure the width of your sway bars (val caliber tool) to order the right size in the kit. You can swap the bushings yourself if you have tools and time.
Once you get the kit in you will need a full suspension calibration (toe, camber, alignment).
MR2 equals investment :)
Depending on how far you want to take your suspension / handling, if your thinking of upgrading your sway bars soon, then get the bushing size for the sway bar size you want to upgrade to.

Thanks Tony... So the kit I linked will do everything yeah? I don't have the tools to work under the car so I'm just going to have to pay someone to do it... the sway bar if I can get under I can measure but what about the rear control arm. Would the above kit include that and if so, how do I measure that? Do I have to take it apart to measure.

Sorry for the noob question but once it's done all I have to do is go to a suspension place like (http://www.sydneysuspension.com.au/) and ask them to do an alignment and suspension calibration. Do you know how much that will cost? rough indication so I know i'm not getting ripped off