RT142 front struts share the same part number as xA6x Celica / Supra (I.e. RA60, RA65, MA61, etc)
http://www.toyodiy.com/parts/xref?s=48021-14070&mG=on
So physically any shock that fits xA6x should fit your struts...
You haven't been super specific with info regarding your car and desires so it's hard to help further... you haven't even said if its a sedan or wagon!
Monroe, Pedders, etc all have online catalogues that are easy to use to find out what they recommend (Not suggesting that you do / do not use these brands) and once you have a suggested part from them you can start trying to cross references to other places if you have a brand in mind...
If you want to get into more detail, pretty well all shock manufactures will have a catalogue available (you will most likely need to look for it / ask for it) that lists dimensions for all their products, once you have looked up the dimensions of the "OEM" replacement shock you can trawl through the catalogue and match up other options depending on what your goal is (lowering, etc).
Cheers
Wilbo
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