um... shouldn't be what grade ATF did you use?
iv bin running just normal power-steering fluid (not ATF) its like $10 per L
as if you put the pump out it is a normal pump nothing fancy about it
however Toyota normally say "this is specially made for the imported MR2 "
like my alternator / ac compressor powers-steering relay and so on
yet my alternator without the bracket fits and came in a land-cruiser the ac compressor is from a Camry from memory
and the relay is just a normal 130 odd amp relay Toyota generally say this so they c an charge $33 for a $10 bottle lol
Toyota try never to make "custom" bits for cars it would slow the production down
also the pump is PN 44310-17010 can be replaced with 44310-17011 witch comes on a
Toyota 4Runner 1993 V8 & V6
but the Toyota stuff is pretty good PSF