If you want another Kiwi, buy another Kiwi. They're less money on the used market. Why don't you use your existing KIWI and put a new capsule on it if you want to see how it sounds. But copying the PCB is pissing people off.
Did you see the lawsuits between Violet and BLUE a while back?
Did you get the policy of not messing with in-production mics?
If you want to see the schematic for education, call BLUE, they may share elements with you. But to fabricate your own when they are commercially available is a no-no on this forum and you're going to piss people off.
Maybe I'm not correctly reading your intent, if so, I apologize in advance. But it seems like you are not living in the spirit of this group. Modify your existing Kiwi with a new capsule = cool. Copying the PCB of an existing product is crap.