i would use an e153 with the 3sgte, plus they are easier to find in USA.
but if you do want an s54, i can source one, but it wont be cheap to ship
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★ 1993 Toyota Corolla Saloon ★トヨタ 花
AE-202 Owner
It's all about N/A Power.....
198 bhp and 148 lbft4efte Build : http://www.ae101ownersclub.com/t3-1993-toyota-corolla-saloon
3SGE Build Part 1 : http://www.ae101ownersclub.com/t291-the-ae-202-project
3SGE Build Part 2 : http://www.ae101ownersclub.com/t1388-the-ae-202-project-continued