ka24de oil pumps, what available?

[ryan hagen]

so i did a search and didnt find any thing that jumped out witha answer
i m getting the parts together so far for my ka-t
i m rebuilding a 93 ka24de

so far i ahve found:
1.oem
2.top line....$150
3.toga performance......$200

import performance parts has the toga

now this toga pump says its performance, and higher pressure, i want somehting that will give good enough pressure even with the turbo, and probally 2 oil coolers.

i heard some thing once about shimming a pump to make it work better?