Thanks for the replies.
 
Coilovers - In regards to the Tein's. They are pretty old and don't even know which model they are so still most likely will go down the route of new coilovers. But worthwhile keeping in mind.
 
Caster rods - I don't know which version I have. To be honest I still am not quite sure what they are! If they are the Strut Bar To Chassis Mount Bush Kit, then the following should fit as my SW20 build date is 12/92 so is Rev2? https://superpro.com.au/find/superpro-bushing-kit-for-a-superpro-suspension-parts-and-poly-bushings-for-toyota-mr-2-sw2-1989-2000-/productnr-SPF2942K/cid-999500906/vid-
 
Tie rod ends - have just ordered the following Hardrace RC Tie rod ends... Wasn't aware that these wouldn't be legal.
https://www.hardracesuspension.com.au/rc-tie-rod-end-for-toyota-mr2-mr2-sw20.html