Stay away from AIM for the bag parts, trust me, there is a whole list of reasons not to go with them. I believe store.gaugemagazine.com sell kits for the celica. If they don't I can give you the number of a local guy around here (where i live) who can get that kind of stuff.
One thing to remember about bags is do not go cheap. There is so many different things that can go wrong with it that you don't want to ruin it all because you cheaped out on something. Use only DOT fittings and airline, use quality valves, and use a good bag and shock. I have a bagged truck so I know what all is involved in bags.