You could always build yourself a new engine
Which you can as you can get every part. But with gear box would most likely run to about $8000 USD.
Man unless you speak Japanese , or have a friend there your pushing **** up hill.
I should know , i work for a Japanese company.
People like RPM GARAGE scout around for these engines...........
I will have a bottom end for sale in the new year. New engine .
Find a grey top head , then the other pieces and your done.
If you find a MR2 clip i can guarentee you that kieth will charge more than $5,500
before shipping.
BTW DAVE from MR2 WAREHOUSE gets his clips from RPM GARAGE