Before starting to cut up the (new) engine wiring harness (N3H2-18-05ZJ) from my factory-new 4-port RX-8, I decided to see what it costs new:
from $830 to more than $1,100 at Mazda dealer.

So maybe it would make more sense to sell that on eBay and try to source the injector and crank-angle pick-up connectors?

Decades ago, prompted by this list, I bought a bag with 8 connectors. (Part No.2400. 0 85132 02400 1). Unfortunately they don't the 195500-4430 and -4460 injectors.

Found this

https://www.ebay.com/itm/mazda-rx7-rx8-camshaft-crankshaft-cam-crank-angle-position-sensor-connector-plug/202740646302

and this

https://www.ebay.com/itm/4x-Nippon-Denso-2-Pin-Fuel-Injector-Connector-Plug-Clip-Kit-ID2000-High-Tag/283031986633

Am I silly and should I just cut up the harness?

Finn